system
Given the following post, respond as if you're commenting on Reddit:
human
[ENDGAME] What if Thanos had help from the Avenger's enemies?

Thanos upon learning of his future demise decides not to take any risks and tells the 2014 version of their enemies of their would be fate as they all die. Promised a future free of their enemies, they help Thanos accomplish his goal of destroying the galaxy.

How the final showdown play out with Thanos getting the extra help?

Clarification: by 2014 I meant to say Thanos came and saw their enemies in 2014 and warn them of how they will die at the hands of these heroes and offer a chance at vengeance once they get the means to enact it by taking them all with him once they are ready.
gpt
He finds Ulysses Klaue selling arms out of a derelict shipyard in Africa.  The two hit it off almost immediately.  

Thanos is endeared by Klaue's psychotic lack of fear for his own safety and is surprised to discover that he likes the man's taste in music.  Klaue is impressed by Thanos' operation, especially his ship.

The Black Order becomes jealous at how quickly this human has supplanted their father's favor.  One by one they find excuses to take missions far away from the hollow halls of the *Sanctuary 2*, endlessly echoing various brands of Earth synth-pop.

After a while, it's only Thanos and Klaue.  But the two instinctively know that that's all they need in this crazy mixed-up Universe.  For the first time in each one's life they have found the ultimate treasure - a friend.

The final battle goes worse than before, since half the Black Order doesn't even bother to return, but the pair are inseparable on the battlefield.  After Tony's snap, Thanos looks around and finds Klaue lying broken in the mud, critically injured during the last desperate scramble.  He pulls off his helmet and drops to his knees next to his fallen friend.  

Klaue feebly tries to reach up.  Thanos clasps the man's hand in his own.  The two nod at each other and Klaue cracks his toothy lopsided grin.  Thanos chuckles in spite of himself.  Then the two dissipate in a cloud of dust, both with smiles on their face.