Transformers 2: Revenge of the Fallen Storyline

Spoiler Alert! Spoiler Alert!

So first, I guess we should get to the juicy stuff. Some information comes from "Toadimus Prime" who has posted some storyline rumors told to him by a source. The rumors are posted below.

• The film opens with the US Military teaming up with the Autobots, who are the military vehicles, to hunt down rogue Decepticons. Springer is one of them, and this is the part in China.
• Wheels/Wheelie is a blue remote control car and very small Transformer. He discovers Jetfire at the museum by driving underneath him and seeing the Decepticon symbol.
• There's a seen [sic] where Alice pins Sam to the bed, and a tail with a hypodermic on it [comes] out of her back. She also has a giant tongue, apparently. Should keep the Kiss play fans happy!
• The twins are improtant (sic) characters who fight each other a lot and can combine.
• Devastator looks like a gorilla, and has the cement mixer drum in the centre of his chest, which he can use as a weapon.
• Possibly Superion as an autobot combiner, but he was a little vague on this.
• Megatron hasn't been in any of the film licensing stuff, just the toys.
• He saw a Decepticon Hot Rod model, but he's convinced that was part of the [misinformation] campaign.
  

Most of the information does not vary widely from what we have previously heard. However, the Superion rumor is quite interesting.

There is quite a large possibility that the character will not appear in the film, which (I'm assuming) most of the fandom most likely thought so.

However, several entertainment websites including IESB have reported that Superion will make an appearance in the film and the rumor above seems to add fuel to it. What the source saw is most likely just promotional material for the repainted figures.

Next, the Transformers Live Action Movie Blog has also posted rumors of its own, including some rumors of the Megatron and Starscream duo.

Totally contradicting the previous rumors you've read by "Toadimus Prime," source "Tawd" reports:
"They're going to bring back Megatron and the Starscream/Megatron relationship will be more prominent than it was in the movie and much more like the G1 series. Also, it may be a three way brawl...[with] the Fallen [posing] a threat to both sides."

Source: Tformers