However, the Russo Brothers — who directed both Avengers: Infinity War and the upcoming Avengers: Endgame — recently said that they have no doubt that the X-Men will soon join the MCU.
When Kevin Feige had last been approached about his plans for the X-Men in the MCU, he said he was focusing on the Marvel projects coming out in the near future — including Captain Marvel and Spider-Man: Far From Home, and the other MCU films already in development — before moving on to anything else.