The Marvel Cinematic Universe isn't the well-oiled machine that it once was in terms of production and quality. Reception to recent projects has been fairly middling compared to previous entries, and the general hype is a lot lower than the excitement for the brand at its strongest. Likewise, overarching villain Kang the Conqueror hasn't been able to fill the shoes of previous antagonist Thanos, and that's without mentioning the legal troubles of actor Jonathan Majors, who portrays him. Marvel Studios supposedly had plans to fix this situation, though it's now far too late for this idea to be implemented.
Source：https://www.cbr.com/replacing-kang-mcu-repeat-justice-league-mistake/
