Marvel Studios may have already set up the perfect storyline for Phase 6's Avengers 5, which could see the Avengers battle the X-Men in the MCU. Marvel Studios chief Kevin Feige first announced the development of Avengers 5, then titled The Kang Dynasty, in 2022, along with its sequel, Avengers: Secret Wars. Since then, however, the upcoming Phase 6 crossover project has undergone huge changes, as director Destin Daniel Cretton and writer Jeff Loveness departed production, Jonathan Majors' arrest and conviction caused confusion, and a title change has been reported, throwing the status of Marvel Studios' Avengers 5 into uncertainty.
https://screenrant.com/avengers-vs-x-men-the-marvels-mcu-theory/