Flash I had no interest in seeing, never got into the series or story... Indiana Jones to bring back now, from my point of view (especially after Ford's Star wars horrible return) felt like dragging him out as a big name to drum up ticket sales. New movies and storylines are a risk, it's safer to stick with what has sold for years I guess. I haven't looked but how did ghostbusters do recently?

super mario is like 40 years old and spiderman is even older, so I'm not sure they really count as "something new" as far as franchises go.

I don't think people are sick of the same old stuff. Indy flopped at the box office on the combination of a disappointing 4th movie and Disney's trend of virtue signalling over good characterization and storytelling.

The Flash has the baggage of an unlikeable lead actor, plus the DCU is still all over the place and constantly rebooted. I honestly have no idea what to expect from the Flash, given previous DCU movies.

No, but it means that mediocre cash grabs won't make as much money anymore.

People did show up for Flash. The movie wasn't great so the week to week drop off was massive. I think it's more about being served poorly written movies. If the films are of quality it is clear people will go see them. I agree that many types of movies aren't popular in theaters anymore. The streaming battles of 2020-2021 hurt the market and trained people to expect high quality offers on streaming platforms. I think that was a bad move by studios rather than waiting out the storm and it will be a hard road getting back to a more balanced release schedule for theaters.