runtime
The cast is getting stuffed, and likelier to continue to be, since we're still awaiting word on a few legacies, and beyond that, we have Anna Camp and not quite half a dozen teen characters. I feel like that's not really enough for both suspects and victims. And, if this is to be a for-now finale, they'll want to really service the characters.
I wouldn't be surprised if it's the longest film in the franchise, I wouldn't be entirely surprised if it nears 2 and a half hours.