Movies and TV Shows

She went from relatively small roles to starring in an HBO TV show (albeit for less than one season) to a lead role in a comic book film franchise. That's a huge leap.

As long as the film is just OK she'll do fine and set herself up for plenty more work. Look at Daisy Ridley, Star Wars is obviously a bigger franchise and the films with her were poorly received (generally) but everyone recognizes it wasn't her fault and now she's got plenty of films lined up.

Also look at the terrible Sony Marvel films, Tom Hardy did two (soon three) of those, Jared Leto & Matt Smith did Morbius, Aaron Taylor-Johnson & Russell Crowe have Kraken coming out. Those are sizable actors doing terrible films, I'm confident they got paid. (Also Dakota Johnson & Sydney Sweeney will be in Madame Web, smaller actors but money for sure.)

In general taking the big franchise is a safe bet. It used to be safer in MCU land, but still safe. DC you have to hope, but at least Gunn has a good track record so far.

I wonder what the value proposition is for actors taking on these movies anymore.

A decent pay cheque I imagine. Also, if you've ever dreamed of being able to fly or punch a bad guy through a wall or what have you, you'll be able to live our those fantasies (and getting paid for it). In other words, it might just be a fun experience. Not everything has to be a calculated career move.

Surely she has the pull to land something better right now?

I dunno. House of the Dragon was her big break, no doubt, but she was only in a handful of episodes. She didn't break out in the way that, say, Emilia Clarke did on Game of Thrones.