Quoted from mbrave77:Finally blew up this game a bit after so much frustration. Cleared just over 800mil and that was with my last ball draining right after save cleared.... Got 5 gems and fended off Thanos attacks protecting both my gems which was awesome.
What triggers the final battle with Thanos? I did all the gem quests and black order multiball. The game didnt really give me a hint as to what to do next....
Only one thing to do at that point...Battle Royale (third Avengers Assemble). Then you would have had Thanos Battle. Getting close!