Originally Posted by blueserenity
Again the big thing I see repeated on here is the idea that DOFP is a major selling point. It really isn't.
And I don't think that the two casts would be such a major selling point either. It would appeal to the people who loved the original trilogy, for sure, but it's not really taking it out of a regular X-Men movie universe and into a major crossover thing like The Avengers. And because it is not an introductory movie I think you'd kinda need to know who the heck everybody is and what their relationships to each other are - again not like The Avengers which was an introductory movie made to be enjoyed by both the people who saw the individual films and those who didn't.