TBH I think Capcom still need to do a bit more in terms of variety to reach their late '90s/early '00s levels. Their main IP ATM are RE, SF and Monster Hunter. But back in that era, they had those in addition to MvC, Dino Crisis, Onimusha, Megaman X, Rival Schools, Power Stone, and tons of more one-off hits of various levels.
I don't think the economics exist for multiple fighting games like back in the '90s but I think if they can't do MvC anymore, they should just pair SF with a Capcom vs Capcom style fighter that takes the place of MvC, more or less, maybe with some guest characters from other franchises. And maybe Capcom feels they only have enough room in the survival-horror space for a single IP, so maybe bringing Dino Crisis back isn't viable. But they could just do a RE spinoff where the story somehow involves dinosaur DNA and just have callbacks to Dino Crisis that way.