Re: How should they handle Wolverine in this movie? (if he had to be in it..)
Out of these three options, C. If they make Wolverine the time traveller it will pretty much be a Wolverine show and everyone else will be dancing around him. No thanks to that. In fact if there's a time traveller character at all, I'd like him/her to be a future version of one of the characters in First Class, not someone who has no connection to this young team.
I'd be ok with a brief Wolverine cameo in the future universe with the rest of the original cast.