History WMG / HappyDeathDay2U

* In the first movie, the time loop latched onto Tree because of all the people in relatively close proximity to Sisi, she had the least amount of time left to live. Once she prevented her death, the loop transferred to Ryan since it was his turn to die. But when Tree was knocked into the alternate timeline, the loop returned to her. [[spoiler:If true, this makes for some serious FridgeHorror since it means that DARPA (and possibly even Tree herself) are repeatedly killing Danielle in the name of a science experiment.]]

* Ryan showed at the start of 2U that [[spoiler: Tree wasn't the only person who could time-loop]]. While the Stinger seemed [[spoiler: to set up Danielle as the looper for number 3 during DARPA's experiments]]... um, who the hell would knowingly pick a [[spoiler: spoiled, bitchy, BrainlessBeauty sorority chick]] as the centerpiece for a highly confidential, very strange experiment that could have permanent effects on the body and mind? Actual, controlled experiments have ''properly prepared and screened'' volunteers for that sort of thing, even under-the-table Government experiments. [[note]]not to mention, the audience would have to suffer through HOW many loops before Danielle figures it out, or spends enough time with Tree for her to figure it out?[[/note]] Given Tree's expression as she tells the DARPA agent she knows the perfect person for their experiment, Danielle sitting up in bed and screaming could just be Tree's ImagineSpot.

** this could even lead to the choice for the Babyface Killer: [[spoiler: an Alt!Carter. 2U had a murderous Alt!Ryan trying to kill the original Ryan while he was time-looping, who disappeared (presumably sent back to his own universe once Sisi was fixed). If Sisi malfunctions and sends Carter through a time-loop, what about an Alt!Carter doing the same thing for a different reason: Alt!Carter lost Tree (possibly to another killer version of Lori), and now he's in a universe where she's alive, he'll do whatever he has to in order to stay with her, which means getting rid of Original!Carter. This would even tie into Tree's dilemma from 2U.)]]

[[WMG: In #3, the Babyface Killer will be [[spoiler: Stephanie Butler]] ]]
* In #1 [[spoiler: Lori killed Tree over her affair with Gregory Butler]]. In 2U, [[spoiler: Gregory Butler was trying to kill Lori to cover up their affair, and Stephanie was helping him in order to avoid scandal.]] In the alternate ending for #1, [[spoiler: after she fixes the time loop, Tree was murdered by Stephanie as revenge for sleeping with her husband]]. Following this progression, #3 [[spoiler: might have Stephanie finding out about Tree's (now-ended) affair with Gregory because of the scandal of Lori's attempted murder and subsequent death at the end of #1, and deciding to kill Tree in revenge.]]
** Wouldn't that be a little [[spoiler:repetitive, seeing that she is the other killer in this timeline]]?

* Much like how [[spoiler:Lori gained AdaptationalHeroism in #2]].

# The looper keeps changing each time. So first time around from Loop 1 to 2 it might be Tree, then it might be Carter from 2 to 3, then Ryan from 3 to 4, etc. Tree would have to be around to put the idea of looping in everyone's heads for it to persist, even if she isn't the one actually looping since she'd at least have familiarity with the concept. The obvious investigation choice is to see who never loops since having the killer be a looper might be too OP. [[spoiler:Unless the killing is caused by some outside malevolent force acting through one of the characters and it becomes something to try to fight back against internally. Like, Iunno, Tree realizing it's trying to harness all her anger and fury at being stuck in so many time loops and she has to do FightingFromTheInside to stop herself.]]

Other Tree [[spoiler:performing community service instead of getting expelled and charged with a felony for stealing an officer's sidearm and pointing it at said officer is partly due to the officer's incompetence. No one was guarding Tombs at the time he was freed. Even under sedation, there should've been ''someone'' guarding the prisoner at all times. He also wasn't entirely ''listening'' to Tree when she warned him about the situation and told him to get help. When the authorities found Tombs dressed and armed with a knife and the other killer dressed the same way, Tree would've had a very strong case for mitigation. Also, any inconsistencies in her statement could be dismissed as the effects of a concussion, which other Lori witnessed during Tree's fight with Gregory.]]

In another dimension, there's another Tree that also lost her mother but couldn't let go and move on. Ether she stumbles across Ryan's thesis project or is a participant who becomes obsessed with time travel to save her mother. Unlike the original Tree, this Tree is even worse--broken to the point of being like original Lori--and willing to do ''anything'' to get her mother back, including theft and murder. She was the one responsible for setting off her dimension's SISI at 12:01 on the 18th, but ends up in a time loop like the others. After getting out of her loop, she doesn't changed but instead more determined and obsessed. This eventually leads to a showdown between her and the original and alternate Trees.

[[WMG:Another Tree from another dimension is the one responsible for starting the time loops and becomes the antagonist]]
In another dimension, there's another Tree that also lost her mother but couldn't let go and move on. Ether she stumbles across Ryan's thesis project or is a participant who becomes obsessed with time travel to save her mother. Unlike the original Tree, this Tree is incredibly broken and willing to do anything to get her mother back including theft and murder. She was the one responsible for setting off her dimension's SISI at 12:01 on the 18th, but ends up in a time loop like the others. After getting out of her loop, she is even more determined and obsessed. This eventually leads to a showdown between her and the original and alternate Trees.

Other Tree [[spoiler:performing community service instead of getting expelled and charged with a felony for stealing an officer's sidearm and pointing it at said officer is partly due to the officer's incompetence. No one was guarding Tombs at the time he was freed. Even under sedation, there should've been ''someone'' guarding the prisoner at all times. He also wasn't entirely ''listening'' to Tree when she warned him about the situation and told him to get help. When the authorities found Tombs dressed and armed with a knife and the other killer dressed the same way, Tree would've had a very strong case for defense of a third party. Also, any inconsistencies in her statement could be dismissed as the effects of a concussion, which other Lori witnessed during Tree's fight with Gregory.]]

Other Tree [[spoiler:performing community service instead of getting expelled and charged with a felony for stealing an officer's sidearm and pointing it at said officer is partly due to the officer's incompetence. No one was guarding Tombs at the time he was freed. Even under sedation, there should've been ''someone'' guarding the prisoner at all times. He also wasn't entirely ''listening'' to Tree when she warned him about the situation and told him to get help. When the authorities found Tombs dressed and armed with a knife and the other killer dressed the same way, Tree would've had a very strong case for defense of a third party. Also, any inconsistencies in her statement could be dismissed as the effects of a concussion, which other Lori witnessed during Tree's fight with Gregory.]]

[[WMG: Original timeline's Tree wasn't performing community service, she was volunteering]]
In the evening of the 19th of Tree's timeline, she had nothing to do with turning on Sisi, nor the events involving Tombs at the hospital. In fact, she and Carter were telling Ryan to turn the reactor ''off''. In front of witnesses. They weren't picking up trash as punishment, but they were instead volunteering. It was also a way for them to talk to their friends about what happened without anyone listening in.
** Alternatively, Dean Bronson may have blamed Carter and Tree for what happened with the reactor just for being there. Only to realize later that Tree and Carter were more involved than he thought and told DARPA about it. Hence why the two were brought to the lab along with the others.

Other Tree [[spoiler:performing community service instead of getting expelled and charged with a felony for stealing an officer's sidearm and pointing it at said officer is partly due to the officer's incompetence. No one was guarding Tombs at the time he was freed. Even under sedation, there should've been ''someone'' guarding the prisoner at all times. He also wasn't entirely ''listening'' to Tree when she warned him about the situation and told him to get help. When the authorities found Tombs dressed and armed with a knife and the other killer dressed the same way, Tree would've had a very strong case for defense of a third party. Also, any inconsistencies in her statement could be dismissed as the effects of a concussion, which other Lori witnessed during Tree's fight with Gregory.]]

In another dimension, there's another Tree that also lost her mother but couldn't let go and move on. Ether she stumbles across Ryan's thesis project or is a participant who becomes obsessed with time travel to save her mother. Unlike the original Tree, this Tree is incredibly broken and willing to do anything to get her mother back including theft and murder. She was the one responsible for setting off her dimension's SISI at 12:01 on the 18th, but ends up in a time loop like the others. After getting out of her loop, she is even more determined. This eventually leads to a showdown between her and the original and alternate Trees.

It's made clear that Tree has bonded with Ryan, Dre and Samar over the course of the film, and her parting words to Ryan clearly leave a lasting impact on him. The same with her last conversation with Lori. After Lori recovers and talks to the returned Tree and Carter, she finds out the truth and joins them as TheMedic. Likewise, just as in Tree's "home" dimension, this Lori and Tree accompanies the group to DARPA and provides critical information that leads to the first practical time machine and inter-dimensional travel. This eventually leads to the two groups meeting and uniting against a common threat.

It's made clear that Tree has bonded with the creators of S.I.S.I. over the course of the film, and her parting words to Ryan clearly leave a lasting impact on him. The same with her last conversation with Lori. After Lori recovers and talks to the returned Tree and Carter, she finds out the truth and joins them as TheMedic. Likewise, just as in Tree's "home" dimension, this Lori and Tree accompanies the group to DARPA and provides critical information that leads to the first practical time machine and inter-dimensional travel. This eventually leads to the two groups meeting and uniting against a common threat.