The first question was whether there were any more Agents of Atlas planned, to which Parker cagily replied that there ”may or may not” be more coming, and that he “may or may not” be planning a mini-series that may or may not include more Gorillas and that “may or may not” answer the fan’s question.

That was followed up with the question of whether we are going to see more obscure or non-X-Men characters in First Class. Parker’s short and sweet answer was, “yeah, sure, why not!” Elaborating, he stated in issue #5, they meet the Hulk, “because there’s nothing saying they didn’t meet him then.” The writer mentioned that, in the ‘60s, the X-Men weren’t supposed to be so cut apart from the rest of the Marvel Universe like they are now, so he can get away with putting more of Marvel in his series, as it stays true to how stories were written back then.

http://forum.newsarama.com/showthread.php?t=117003