Not willing to bet that Carson will be chosen, but he could be a top choice.
Trump doesn't realy need a "pit bull" or "attack dog" as mentioned upthread, he is his own. Carson could serve well as the "good cop" in straightening out the R party.
Being Number 2 in a Trump WH could indeed mold Carson into the ideal R president, and then given a "fighting" VP.
Rubio is qualified for VP only by reading an expressly unintended meaning into the 14th.
That, IMO, leaves a toss-up between DeSantis and Burgum as VP best suited to step into the Oval Office if necessary.
Excuse me, tricky “back button”.