- Partially confirmed, the second trailer briefly shows us Cybertron, where we see a few characters with G1 designs.
- Doubly confirmed; the entire opening scene on Cybertron is basically a love letter to G1 Transformers.
- Jossed. Bumblebee gets a ton of screen time and the Decepticons are given more screentime than the other films beforehand.
- Zigzagged; Charlie's and Bumblebee's relationship certainly brings some levity to the film, but there's still some pretty heavy stakes and a fair few gruesome deaths (and they don't just happen to the Transformers).
- Zigzagged...he does scan a Camaro, but he joins none other than Optimus Prime, in his G1 vehicle mode nonetheless.
- Jossed: Albeit Bumblebee does scan a 1977 Camaro that resembles the one from the 2007 film, Optimus is already on Earth, even with his Generation 1 Peterbilt Freightliner altmode. In addition, at the end, it shows the other Autobots entering orbit. It's been very recently confirmed a reboot, so the 2007 film is no longer canon.
- The last scene of the teaser trailer seems to suggest that.
- Zigzagged; Charlie is the one who fixes him up a new radio, but Bee himself is the one who figures out how to use it for communication.
- Jossed; he does make a brief cameo, but Soundwave and Shockwave seem to have command on Cybertron, while Dropkick and Shatter are the film's primary antagonists.
- Jossed; she lives.
- Explicitly confirmed. Albeit with several occurrences that seem reminiscent of things established from the prior films, i.e. Bumblebee's losing his voice, in addition. from the addition of Bumblebee scanning a 1977 Camaro by the end, it immediately shows Optimus has already arrived on Earth, in his G1 altmode of a Peterbilt Freightliner, whom Bumblebee shortly joins. Afterwards, it shows Prime congratulating Bee's efforts in a forest, before witnessing the remaining Autobots entering orbit, all in the same timeframe.
- Jossed: It's been confirmed an explicit reboot with some affectionate nods to the original film that only make it seem like a prequel, notably the inclusion of Bee's first Camaro altmode. Unicron is completely uninvolved.
- Jossed. He's not even in this one. His appearance was scrapped when they reworked the film into reboot
Or This Troper could be utterly wrong and the Decepticon jet really is Blitzwing.
- Confirmed, it's Blitzwing. Albeit Starscream does appear in the intro of the movie on Cybertron.
- Well Blitzwing is never named in the film so it could be neither Blizwing nor Starscream, there were a lot of seekers on Cybertron.
- Jossed. Starscream makes a cameo in the opening scenes on Cybertron, and the red jet really is Blitzwing.
- Confirmed. Blitzwing rips it out after briefly interrogating Bumblebee.
- Jossed. Shatter and Dropkick are the primary antagonists, though Shockwave is one of the main commanders leading the Decepticon forces on Cybertron.
- Confirmed? Megatron is noticeably absent throughout the film, and Soundwave & Shockwave are the ones commanding the Decepticons in the opening scene on Cybertron.
- Jossed. While Shockwave, Soundwave, and Starscream are in command of the Decepticons, Shatter and Dropkick are explicitly the antagonists.
- Confirmed; he appears in this mode complete with his iconic trailer in G1 decals driving along side Camaro Bumblebee on the Golden Gate Bridge. Although what specific Cabover he is hasn't been confirmed
- Alternatively, Bumblebee (B-127) merely time traveled back to WWII in the decades between 1987 and 2007.
- Nope, it's been confirmed a reboot.
Some examples of hypothetical scenarios:
- When being introduced to the others, Arcee could be introduced as something along the lines of 'RC-1280some-long-list-of-numbers'. Wanting to shorten that, Charlie decides to call her just 'RC', which gets interpreted as 'Arcee', giving her the name.
- Sideswipe could be introduced under a similar letter/number designation, but after he sideswipes a Decepticon during a Big Damn Heroes moment, Charlie comments on how he 'Sideswiped that guy' and it sticks.
- Ratchet and her could be working on repairs for others together, and she comments on how he's essentially 'one big Ratchet', and he takes a liking to it.
- Jazz will listen to music with her, to which she points out he seems to "have a thing for Jazz", and it just sticks from then on.
- Ironhide will get an opportunity to show his resilience and durability in battle, to which Charlie remarks on how he seems to have an "Iron Hide" given how he took so much punishment from the Decepticons and kept going.
So on, so forth.
In general, Charlie could just evolve into The Nicknamer, but the Autobots take her nicknaming extremely seriously because it gives them an identity outside of their robot serial numbers.
- Before you come at me with the "it's a reboot!" comments, please hear me out. It is true that the character designs are completely different from the Michael Bay movies, but this I blame on the different directors. Same with the Cybertron design. But this is my attempt at solving the problems between continuity.
- TF1-everyone was still searching for the Allspark. It was an important part of the war, hence why Megatron went missing looking for it. But the Autobots coming to Earth in this movie wasn't to find the Allspark. At the time, all they needed was to regroup during their losing battle with the Decepticons, which they did. They left Earth with the full intention to come back to find the Allspark later.
- TF2-no contradictions here, at least that I can think of.
- TF3-as this movie shows, the Autobot-Decepticon was just going that badly, hence why Sentinel Prime made his deal with Megatron. The moon-landing...well, maybe the U. S. government just didn't tell Sector 7 about the transformers. After all, TLK proved that there were people trying to keep the Transformers under wraps.
- TF4-there's really nothing wrong here.
- TF5-this REALLY complicates things, but here's my attempt to connect the dots. The Transformers were likely coming to Earth to look for the Allspark, or possibly a way to kill Unicron. Yes, Bumblebee helped take down Nazis, but we only saw that one battle. For all we know, there were battles after that where Bumblebee suffered devastating losses. Therefore, when he found himself on Earth again, he was apprehensive about humans.
Whew, there we go. This is all my best attempts at connecting the dots between all of these movies.