I am afraid about the mcu

While I understand your worry, I think that Disney won't fuck it up. Disney is aconglomerate and knows how to run a business, hell they've been running marvel for like 11 years now, and so far, so good (sure there havebeen some downs, but there have also been ups). And if they do fuck up, the backlash of fans will easily repair any damages. Cause Disney does care about its image, in the end.