That's exactly the way I see it too; smacks of dick-punching vengeance.
I don't see him wanting to be Drumpf's VP pick though, he's too 'establishment'. That and he was a shitty Speaker. Christie is probably closer in contention, having few friends in the GOP now too, and is a kindred loudmouth bully.
Why do you think he was a shitty speaker? I think he actually did pretty well despite being dealt an almost impossible hand. Not great, but pretty good.