I don't think you can without doing some kinda multiverse collapse where all of a sudden mutants been there all along and only a few realize it was the result of whatever. From there I think you do smaller "weird" alternative style Disney+ shows leading to big crossover "event" movies. Like imagine a X-Force show with black ops mutants killing anti-mutant militants that eventually builds to some big budget massive x-men vs sentinel oriented movie. Or a jean grey going mad miniseries, a kinda Wanda Vision 2.0 that leads to a proper Phoenix movie. A weapon x prequel series that shows all the brutality those mutants went through and military fukkery that leads to an r rated Wolverine vs Saber Tooth blood bath movie.