Just saw this where apparently Gunn is mapping out the cosmic side of the MCU Post-Phase 3 along with Feige:
http://www.hollywoodreporter.com/heat-vision/james-gunn-guardians-3-marvels-cosmic-plans-1027046
In regards to the Fox owned properties, I don't think Marvel have plans to approach them about any kind of deal just yet. With all their current focus being on Avengers 3 and 4, they don't need either the Fantastic Four or the X-Men right now, but they will eventually. There's only so long you can survive without those characters, especially the Mutant side of things which, arguably, is an even bigger part of the Marvel Canon than Reed and Co. To that end, expect them to start talking with Fox at some point after Phase 3.