If DeSantis wins the primary, I think he can definitely win the election. I think his biggest problem is going to be winning the primary tho. He's made a lot of enemies in his own party and that usually comes back to bite you. Will be interesting to see how it plays out.
That said, I don't think he's the future of the party. He's just not that likeable. I think people like Noem, Daniel Crenshaw, Mike Pompeo, and maybe even Nikki Haley are more likely it. They have pissed fewer people off and survived the Trump chaos without ever crossing Dear Leader and getting cancelled by his cult.
Oh, and Ivanka.