He did say the suit was built with nanobyte technology. From other films using that technology, I believe it’s supposed to have some kind of regenerative abilities. So in theory, one suit could be sufficient.
We should hope so. It’s a vital casting. And Marvel has done a pretty great job casting actors so far. And pretty much all of the main characters have been casted with actors who can carry a great deal of personality and wit and comedic timing. She appears to fit that angle at least. I’m curious who were the other final candidates for Captain Marvel.
Among other things, along with the actual dialogue/script, the actors casted have been one of the major differences from the DC films. Obviously, its a huge reason why Marvel characters have been so much more memorable and likable. DC really is a loss cause at this point.