How would you feel if in the end Marvel...

The only mixing that i see is between Planet Hulk and Civil War. I think Hulks comments point to that in so many ways. Saying things like "Wepons wont save the puny humans" or "I'd never stop making them pay". He has to come back and whoop ass and take names.

Personally...I think it would be pretty darn cool tying everything together (as long as it was done in a sensible manner). In science fiction, I've always like universes which contained a lot of initially separate action but then everything tied together in the end (eg, Niven's Know Space series; Baxter's Xeelee Sequence).