Hendo didn't get a HW title shot when he came back to the UFC for knocking out Fedor, so....
No. Mitrione lost to Schaub and Browne. If he cleans out the HWs in Bellator (gets revenge against Nelson and Kongo in rematches, beat Sergei and maybe King Mo), then maybe he'd be 1 or 2 fights from a title shot if he returns. He's also 39, so he'll be in his 40s by then...like a lot of the UFC HW roster. I can't see him ever beating younger guys like Stipe or Nagannou, though.