1. Let's say that Wolverine and Storm find Jean at Akali. Why exactly are they there at that moment?
Xavier somehow becomes aware of her ressurection.Logan and Storm rush to the scene.
2. After Jean escapes from the mansion and presumably goes back to her old home, does Callisto help Magneto find her? How does Magneto get in contact in Xavier in order for them to meet back at the house?
3. If Mystique is captured and is released by Magneto at around the middle or end of the first act, what events lead to her being shackled and handcuffed again to where she' fighting off suited men in what seems to be almost an interrogation room?
4. What events lead or come out from the shot of the Washington clinic explosion?
The brotherhood see the cure as major threat to their nummer one goal - mutant supremacy.Magneto decides to do whatever is necessary to eradicate the problem.
5. What's happening within the scene of Pyro shooting a flame within the truck with Magneto and Juggernaut?
Human toast i guess.
6. Where and when does Angel meet the X-Men? How does he cross their path?
Thats a very good question.
7. What is Wolverine doing before he makes a backflip off a tree in the forest?
Staking out the the Brotherhood's camp like a predator.
8. What is Xavier seeing when he's probing Jean's mind? When does he leave and when does Wolverine come into the room?
I think he sees flashbacks of X1 (Cerebro), Liberty island and her 'death' astral plane style.
9. What is Arclight doing with the shockwave she makes in the trailer?
10. Magneto, Juggernaut, Callisto, Quills, and Arclight are all there at Jean's old street apparently. How exactly did they get there?
Possibley with Stryker's helicopter?