The evidence there is negative: Plenty of well-known actors for major hit movies can't draw people to see movies not in a big franchise. IE Chris Helmsworth's biggest non-Marvel movie is MiB: International, which grossed $254 million worldwide. That's half of the floor for a Marvel movie. Tom Holland starred in Chaos Walking with a worldwide gross of $26 million - I didn't leave off a digit there. Franchises have replaced actors as the main brand to draw audiences.
Not that there are no more starts (ScarJo can sell tickets on name alone), but star power is no longer the main driver of box office results.
Got it - you are positing that the trend that "movies might flop even with talent" is something new and changing the status quo.
Hint: It's not.
Michael Caine was in the
1987 movie Jaws: Revenge. It stank on ice. When asked about it he has a rather famous quote: " I
have never seen it, but by all accounts it is terrible. However, I
have seen the house that it built, and it is terrific."
Half of the floor of a Marvel movie - wow, your calibration is so off that you need to do Marvel level numbers to be a successful movie?
Okay, let's take a look at Chaos Walking. What was the advertising budget of Chaos Walking, because I never heard of it. It released MARCH 2021, cinema only. There's this thing called a pandemic that's been reducing cinema attendees, and a theatric-only release before common vaccination is the kiss of death. Critical respons according to wikipedia was "poor execution and conventional, underdeveloped characters." - sounds like it was released at a ti9me people weren't going to theaters, without much advertising, and wasn't well done. If that's one of your poster children to show how star power is dead - well, you cherry picked an example of everything wrong and tried to blame it on one factor.
Franchises is a separate point, and I already talked about the trend towards sequels and reboots - I should have included franchises in there. But those have existed for a long time in tandem with star power.