Rebel With A Cause
Favorite Answer
Disney and Marvel are still using the X-Men name for their comics, so they will likely use it again for any future films.
Edit: in regards to the other answer, I can confirm that WandaVision has no obvious plan for introducing the X-Men to the MCU. There are plans for the other MCU Phase 4 films, however.
Entropy
Disney re-acquired X-Men when they bought Fox. While the X-Men movie universe is likely dead (except for Deadpool and MAYBE Evan Peters' Quicksilver who might be brought over since they're fan favorites), the MCU will be launching their own versions. There are rumors that WandaVision will be how this is done, but I haven't seen it as a friend wants to watch it together...and covid is preventing that.