The premise for the story (in case you didn't see Part 1, is Magneto and his Brotherhood trying to overthrow Genosha due to there still being mutant slavery there. The X-Men have already been cast HERE
Max Eisenhardt/Magneto - Christopher Lee
All he'd need to do is shave the beard, and there's Magneto. I like McKellans portrayal, but I think this guy would own it. In case some of you don't know him, he played Count Dooku in the new Star Wars movies.
Raven Darkholme/Mystique - Ali Larter
She's done a solid job in everything I've seen her act in, including the two characters in Heroes she played (Niki Sanders and Tracy Strauss). Besides that, I think she has the right look.
Dominic Petros/Avalanche - Adam Baldwin
I think that with many other actors, this character would fade into the background. With someone like Baldwin in the role, he could make him memorable.
St. John Allerdyce/Pyro - Jesse Spencer
He's Australian, so he wouldn't have to fake an acccent, he looks the part, and having seen him in House, I think he could play a villainous character just as well as a nice guy.
Fred Dukes/Blob - Kevin Durand
I had no problems with Blob's portrayal in the Wolverine movie, and he never got a chance to show up with the rest of the Brotherhood, so I see no reason to replace him.
Mortimer Toynbee/Toad - Nate Mooney
Some of you might not know him. He was in the Chris Evans movie "Push." He played kind of a slimy dude there, and that would translate well to Toad. (I was going to reuse Ray Park, but I want to save him for something else later)
Victor Creed/Sabretooth - Dolph Lundgren
Not sure if he'd be up to it, but he'd be PERFECT. He's got enough height to look down on Karl Urban(6'5" to Urban's 6'1"), he's got the voice, and with the makeup, he'd definately have the look. I don't think the age is an issue. If you saw him in Expendables, he doesn't look or act too old there.
President of the US - Adrian Pasdar
Yeah I know, another Heroes guy. It (was) one of my favorite shows, so they'll show up a lot. Adrian plays a good politician, and while I'm not sure what role that the President would play in this, he'd for sure be needed for diplomatic reasons between the US and Genosha.
President of Genosha - Bruce Boxleitner
He's done some bit parts in various movies and TV shows, this would be no different.
These next four roles would be limited to small ones in this movie, but would be expanded in the second.
Lorna Dane/Polaris - Abbie Cornish
Give her some green hair, and she looks very much like her. My plan for including her is that her and her fiancee Havok were captured in Genosha while trying to rescue two of their old friends, Quicksilver and Scarlet Witch.
Alex Summers/Havok - Channing Tatum
I cast them both before realizing they were both in Stop/Loss. They both should have good chemistry, and Channing is a decent actor, even if you have seen GI Joe.
Wanda Maximoff/Scarlet Witch - Michelle Monaghan
She looks the part and has the acting to back it up. Not sure where her character will be going in the future (presumably to the Brotherhood), but she should be able to handle it whatever it is.
Pietro Maximoff/Quicksilver - Colin Farrell
He could play the part very well, and was born the same year as Monaghan, so he would work for a twin.