What do we know for the future heroes.

Hello, new player here. I love the game, but I thought about this, since we should have new heroes in the future and those heroes while probably do the same things as some of the actual heroes.

Like, we got Hulk, who is first Bruce Banner before he transform.but then, if we got She-Hulk, what would be different? I mean, sure maybe the ultimate would be different, but she still do the same things as Hulk. So I was wondering if the devs already talked about this, like not to worry about anything and new heroes would do differents things etc.