Comeback to what, exactly? He's shown doing various strongman/MMA-type training and staring at himself in a hoodie.
As has been said, dude is lost. There's little doubt he would blow up huge if he wanted to (i.e. doing large amounts of gas).
His physique was incredible, but this comeback nonsense is just that, nonsense. He either grows really big in the next five or so months or he's just another talker.