>>84599336They could do with someone youngish, if they are planning to keep the character around for a while. So far that's been the biggest mis-step in the MCU. Contracts.
What they needed were (more) relative unknowns with loose long term contracts. At this point we are facing losing two thirds (?) of the cast, to the point the MCU Avengers will be unrecognizable soon. Losing Iron Man, Captain America and Thor around the same time is going to hit hard.
It was a good move to cast a real teen as teen Spidey. If they can keep him contracted, he could be their lynchpin character for a decade or even two.
Cast right, Captain Marvel could also be a long-stay.
I mean, Captain Marvel, Doctor Strange, Black Panther, Black Widow (hell, how long can they keep her?), Hawkeye, Ant-Man, Wanda and maybe the Hulk? That's a pretty pathetic Avengers team. Sure, not power-wise, but none of them are... well, lets just say it. For the Avengers, Cap, Iron Man, and Thor are basically the trinity.
They might keep Vision around, but I reckon he'll bite it in Infinity War.