If you follow Mark Cuban on Twitter, you know he’s much too stupid to make any political headway.
Cuban is a non starter, as it Dwayne “the rock” Johnson... if they run they’ll grab some attention and headlines just because they are famous and have name recognition, but neither one of them would survive too long in a primary race.
Trying to imitate the Trump model won’t work. If they ran for Senate or House in some friendly state or district, probably could win, but not a chance in hell either one of them could pull off as their first political attempt the White House, not a chance in H-E double hockey sticks.