While promoting Ant-Man and the Wasp, Kevin Feige revealed that he knows all too well that the original Avengers managed to survive in Infinity War.
While that hasn’t been confirmed, there has been a rumor that Avengers 4 ends with the Avengers all going their separate ways with the Infinity Stones.
And realize it’s the original Avengers that are left.”
Kevin Feige revealed these new details in an interview with io9.