Apparently, Fox and Sony have come to some sort of mutual agreement to basically advertise X-Men: Days Of Future Past at the end of Amazing Spider-Man 2.
Total Film reports that it's happening in France and will be attached to the UK cut as well.
It's unknown if the U.S. version of Amazing Spider-Man 2 will feature the X-Men: Days of Future Past clip which features Jennifer Lawrence as Mystique attacking William Stryker's armed forces.
Again, this doesn't seem to insinuate a Spider-Man/X-Men and Wolverine team-up, but it's being used just for promotional purposes.
Who knows though, maybe it's the start of something beneficial for both companies.
Amazing Spider-Man 2 swings into U.S. theaters on May 2nd, with X-Men: Days Of Future Past on May 23rd.