Wouldn't surprise me, A:EMH was cancelled due to a change in business logic, getting the X-Men and FF back is huge.
The only change in business logic/policy that I want to see change at Marvel Animation is their mandatory extreme synergy policy with the live action films. Heck, it wouldn't surprise me that these shows were canceled due to low ratings caused by their extreme synergy policy (as well as partly due to many of their current shows talking down to their viewers and partly due to bland looking art and inconsistent animation) which made their shows very bland and predictable.
Hopefully, Marvel/Disney will return to outsourcing their Marvel animated series out to Film Roman again with a whole new Marvel Animated Universe that is MOSTLY synergy free. I also hope that Disney will finally bring over the English dub of AVENGERS: DISC WARS and FUTURE AVENGERS.