Avengers 4 is going to, at least in some sense, be like Return of the Jedi.
His Return of the Jedi comparison is also reasonable, since Infinity war had a pretty massive Empire Strikes Back style cliffhanger.
In any case, Feige compared next year’s Avengers 4 to Return of the Jedi when talking about the idea of having a definitive conclusion of the MCU’s story up to this point.
The man was doing an awful lot of press for Marvel Studios’ latest release and this kind of got lost in the shuffle.