Bluntly, I don’t think he’d accept the job, because it involves a hell of a lot more actual work than the comically small amount of actual job-related stuff he did while being president, and it’s not something he can skate by on. If he is elected to the speakership and then just doesn’t show up… the House can’t do anything. Which, sure, might be the point, but it would also be extremely obvious that they’re just throwing rocks in the gears, and it’d be essentially impossible to convince anyone with more than a couple brain cells that it’s because of Democrats - and translated into the context of the American electorate, that means it’s a toss-up.