Thank you to Reid Jones' article "Are ALL the clues pointing to the MARVEL crossover we've been waiting for?" for inspiring me to do my own thinking and create my own theory.
Professor Xavier pulls Logan aside and says "Logan, there's someone I think you should meet." He escorts him down a hall and into an empty room with three chairs and a table, and in one chair sits Peter Parker. "Who are you?" mutters Logan. "The real question is who is he," says Parker as he gestures to the dark corner of the room. A familiar figure steps into view. "My name is Nick Fury, and I am the director of an organization that does not exist." Credits roll.
HOW AWESOME WOULD THIS BE??
With [The Amazing Spider-Man 2](movie:508593) post credit scene confirmed to introduce [X-Men: Days Of Future Past](movie:203942), we can only hope the 3 studios, Marvel, Fox and Sony, decide to merge their heroes. I myself admitted that they should not even do this at this point because of how far each series is so far, a lot of explanation would be needed such as why Wolverine and Beast didn't help the Avengers in the final battle with Loki and the Chitari, and why Nick Fury didn't bat an eye at the fact a giant lizard and a web-shooting hero caused major destruction in the same city the Avengers battled in. However, with the introduction of Scarlet Witch in Avengers: Age of Ultron, the characters can now have the chance to travel within alternate dimensions. Meaning, the movies do go along with each other just in alternate worlds.
Let me know your thoughts in the comments below