I thought he grabbed a fire escape. You can see the fire escapes in the background when he first falls and when the camera cuts to the side shot of him falling.
They haven’t released details as to who Sadie Sink is playing. Speculation is that she plays Jean Grey from X-Men, but there’s also rumors that she plays Typhoid Mary. Mary’s a mutant with Dissociative Identity Disorder who is generally a villain for Daredevil, and if she and The Hand both are in this movie, it practically confirms that Matt Murdock is appearing.
There’s also speculation that, if Sadie Sink is playing Typhoid Mary, her mental abilities could cause the Hulk to resurface. In She-Hulk, Banner showed that he’d created a device that kept him from becoming the Hulk. Mary could trigger the transformation anyway, though, with her powers. And the Hulk would be pissed, because Banner’s kept him subdued for years.
They had a Typhoid Mary already in Daredevil or Jessica Jones I believe. Also, would be kind of a waste of one of the biggest up and coming actresses that just happens to be a prominent red head.
True. But Marvel isn’t opposed to recasting when they need to. Terrence Howard/Don Cheadle, for example.
I’ve also seen speculation that she’ll be playing Firestar, though I think that’s probably not true, as she’d be too obscure a character. Firestar debuted in the Spider-Man cartoon in 1981, and didn’t appear in the comics until 1985 (for in-continuity; she’d appeared in a one-shot prior to that).