Board Thread:Television/@comment-1713281-20131004113215/@comment-24308873-20131116220517

Spider-man and X-men do crossover all the time. Not in big events. But a ton of times in their numerous respective series. There is even a few X-men/Spider-man mini-series

Yes it is. Being how the F4 is in the X-universe it would make sense for him to team up with The F4. And ultimately the X-men.

No. Days of future present. It's an actual story. And for this universe Franklin Richards  could prove to be VERY important being how he is a catalyst of said story.