Yep he’s said that a bunch of times on the press rounds but I’m not buying it as Feige also said that they were moving away from the idea of phases which seem to go hand in hand with a cross over event to tie things up. If there’s no cross over event then what would be the point of keeping the ‘phase’ structure. Yet here we are at phase 4.He's been pretty consistent saying they are not doing any big event or building up to big arcs in the near future. So Phase 4 lasting 2 years checks out with what Feige has hinted in the past.
I'm sure they'll do other big team up movies in the future, but it seems that the plan right now is doing what Marvel Comics hasn't done in a long ass time: let their properties naturally build by themselves, do small team ups to get people hyped and eventually go all out with something huge like Secret Wars or Secret Invasion or whatever big event they might do in late 2020's.
EG is now the highest grossing movie of all time and the Avengers franchise has made 7.5 billion over 4 movies - Disney for sure isn’t going to walk away from that kind of money. There was a report going around last year that Iger said they already have the next Avengers level franchise in place post EG on an investor call.