Marvel vs Capcom 3 character screens

This first pic is an early one that shows about how many characters will be in the game.


This second one is the most recent with the spots of Wesker and Spiderman filled in.
Still, counting the open squares...42 characters.
Now, will they add more squares or is 42 it?
There was also talk that they will offer downloadable content, so more characters could come in the future anyways....