Streaming has hollowed out the non-blockbuster market, so studios need to quite literally go big or go home. Going big means the movie needs to have spectacle that brings people to the theater, which generally means huge cgi budgets that tv series could never replicate on a per frame basis. Superhero movies (and remakes) are exploiting preexisting social capital of franchises to be as successful as they are, otherwise it is really difficult to justify dropping hundreds of millions of dollars on producing and marketing a blockbuster spectacle nobody has ever heard of when marvel and other studios are dropping movies with familiar and popular IP constantly.