When I bought it, I played about 30 minutes of Marvel Ultimate Alliance 2, hated it, and threw it in a drawer.  I found it the other day and put in about six hours or so:

• The storyline is boring, then good, then reaaaaaalllly bad.
• X-Men Legends 2 really blew out the customization aspect of the game.  Since then, they've been dumbing it back down, which I don't like.
• Thank God you don't have to go to a checkpoint to change up the team.
• It's really annoying that you can't use everyone, and certain upgrades are locked out depending on which team you choose.
• They really dropped a lot of characters from the roster, while only adding a few new ones.
• Who the fuck is Penance and why is he in this game? (I actually know the answers to both questions, but he's still lame).
• I'm totally going to go back through this to get more achievements.
  

Sounds like a bad game.

The Changed the story line of the civil war.

They reduced the roster by like 50% and since you can't play everyone all the time they reduced it by like 75%.
 43 characters in the original. You can pretty much have 8 at a time in the second one.

I had a decent time with the game. It's not amazing, but I found it to be an enjoyable and worthwhile action-RPG. It also plays very well in co-op.

I didn't like it one bit.
 
But I was a huge X-Men Legends fan, played the hell out of both, the first MUA was alright, but this was just...meh...

" They reduced the roster by like 50% and since you can't play everyone all the time they reduced it by like 75%.  43 characters in the original. You can pretty much have 8 at a time in the second one. "

I'm thinking of getting one of these games
 
Should I just get the first one?

  @mazik765 said:

that makes it 20 characters to choose from + DLC if you got it...too late now.