WMG: Nisekoi

Shuu has a tragic backstory.
"It's already shown that Shuu can be a Stepford Smiler, and his character overall isn't still fully explored yet. Like how he is apparently more mature than the other boys in his grade."

Raku is going to get seven love interests matching the girls from "Take It Easy."
"Four who wanna own me, two who wanna stone me, one says she's a friend of mine." We already have six: Chitoge, Kosaki, Marika, Tsugumi, Paula, and Haru. We just need one more.
  • And Ruri would make seven, and supply the "friend" portion of the equation.
  • Somewhat confirmed. Yui is the seventh, but is not just a "friend."

Raku's pendant is sentient.
And it's actually trying to resolve his problems. Let's see, what happened in the first chapter? He conveniently loses his pendant, which Chitoge finds, and they begin to see the good side in each other, which lead him into the current events. Next, when he tries Chitoge's key it doesn't work, because he isn't in love with her. The pendant needs to be repaired, to give him time to develop his relationships with the girls, and then next, because he's unsure of who he truly cares about, Mari's, Onodera's, and Chitoge's keys couldn't fit. And now, Onodera's sister is interfering with him, and the pendant has gone to her, in order to resolve her hatred for him.

If Raku winds up with anyone other than Chitoge, Tsugumi will help Raku and his woman fake their deaths.
She is, after all, contracted to kill Raku should he ever leave Chitoge, but she has no desire to do that anymore.

The glasses buddies end up together.
Because the glasses wearing best friends who like to bring up their friends crushes are a total match for each other.

Shuu and Haru will wind up together.
Courtesy of Raku having Shuu Playing Cyrano in order to get the pendant back.
  • The reasoning has been Jossed by Raku getting his pendant back without having to do that.

Marika will die from her chronic illness before the story is over.
I just don't see any way to resolve the plot with Marika still in the picture. I can't see Raku marrying Marika unless she's dying, and Raku is trapped in a way that he can't outright choose any of the other girls with Marika around without causing serious trouble. My theory is that Marika won't lose to any of the other girls, but rather to time and her own frailty.

The "fake couple" set-up of is a ploy of the fathers to get Raku and Chitoge together.
They knew about the promise and approved of relationship between their heirs. They probably realized that after ten years the kids might not remember much from what happened when they were five years old, so they created the "fake dating" plan to make them spend time together and make sure they won't find anyone else before they have chance to fall in love again. The henchmen may or may not be in on this.
  • Seems too improvised. If this was their logic, then Mr. Kirisaki doesn't know about the situation with Marika (or, for that matter, Kosaki), and Mr. Ichijou was content to keep him in the dark about it. If Chief Tachibana catches wind of this, things will quickly spiral out of control.
    • Considering the fact that Marika situation is a result of Mr. Ichijou drunken blunder I can see him not wanting to mention it. He might legitimately not know about Onodera.

Mrs. Onodera knows about Raku's promise to Kosaki.
Following the logic of the previous guess, Mrs. Onodera is well aware of what happened 11 years ago between Kosaki and Raku, though she is likely ignorant of the other two girls. "I give you permission to marry my daughter," implies that she at least suspected that Raku would be interested; otherwise it's liable to chase away the help.

Mr. Onodera was involved with the Yakuza and/or the Beehive Group.
Kosaki's presence at the Summer of Promises has yet to be explained. We know that Raku and Chitoge were together while their fathers negotiated peace between the Yakuza and the Beehive Group, but why would Kosaki be there, too? Her presence would make sense, however, if Mr. Onodera was either a bodyguard for one of the leaders or was brokering the deal.

Haru was responsible for the events of Chapter 93.
The broken scale was part of a prank.

Ruri and Shuu knew that Haru was listening to them.
Haru has been an interference all this time, but now she'll at least stop interfering, if not become a Shipper on Deck.

Raku is going to wind up in an Accidental Marriage with Ruri.
Because that is pretty much the only way to make the situation even more complicated than it already is.
  • I think it is safe to declare this Jossed, since the only plausible catalyst for this, Ruri's great-grandfather, is dead.

The anime will have a Gecko Ending wherein Kosaki plays Juliet in the school play and confesses her love for Raku.
The anime is slated to end after 20 episodes, and 10 episodes brought them to the end of Volume 3. This means we can expect the remaining 10 episodes to cover Volumes 4-6, concluding with the school play mini-arc. However, it has to be rewritten to serve as an actual ending. Solution: Kosaki doesn't get injured and the play goes off without a hitch, and Raku and Kosaki admit their love for each other while admitting they can't be together until after graduation because of the Yakuza situation.
  • Given Nisekoi's popularity, this is highly unlikely. Chances are it'll end with an And the Adventure Continues to set up for a season 2 in a year.
  • Promptly Jossed in episode 19 where Onodera sprains her leg, Raku and Chitoge make up and she takes over as Juliet.

Marika will have her new teacher arrested.
Chapter 118 explains it all.

The information on the disk is relevant to the plot.
Just to subvert filler.

Nisekoi will get a Dating Sim adaptation.
Because it would totally work.

The pendant contains the missing page of the story book.
In chapter 90 it was revealed that the story book had a sad ending and Raku altered it to make his promised girl happy. The page containing the ending was ripped out of Kosaki's book. That page is locked inside the pendant and contains the name of both Raku and his promised girl.

Kosaki won't admit she has a crush on anyone because she knows Raku is too dense to realize it's him.
Thus if she actually admitted publicly that she has a crush on someone, short of publicly declaring her love for Raku, she would actually wind up undermining her chances because Raku wouldn't think she's available to be pursued.

The guards are going to figure out that Chitoge isn't the princess and assume that this is a Beehive Group plot to kidnap the princess.
Which makes things get really bad really fast.
  • Jossed. They switch back without a hitch.

Nanako is trying to arrange a Baby Trap for Raku.
Forget trying to push Raku and Kosaki together, she's going for the straight-up seduction option. She probably told them to put lots of lavender in the room, too. And they timed this assignment to be two weeks since Kosaki's last period. And why go through all this? Because she knows that Raku is too honorable not to marry Kosaki if he got her pregnant.

The entire series is just one giant Masquerade.
All the characters are wearing masks, and act according to the role which they're given. The characters will continue to dance as long as the music plays and will only act differently than the role given when out of sight of the other characters or in private.

The new magical girl spin off will have Raku turn into a Magical Boy.
And he WONT cross dress.

Nisekoi shares a Verse with Haikyuu!! and My Love Story!!
The manga has had crossovers with both series and there's no real reason they can't fit into canon.