Stuart Stevens, a very successful former Republican Party political consultant, says it's likely that Trump will be the Republican nominee in 2024 and DeSantis will run as his vice president. If they lose, DeSantis will not be blamed for the loss and will have an open shot at the nomination in 2028. If they win, Trump can only serve one more term, which makes DeSantis the presumptive Republican nominee in 2028. If, during his second and final term, Trump dies or otherwise becomes unable to serve, DeSantis ascends from VP to POTUS.
Just posting this as someone else's observation which I found interesting, not something I am for or against.