What is your prediction on who will kill thanos in the next Avengers movie?

Probably a joint effort with all the avengers

It could end up being either Gamora, Nebula, or both who get their revenge on him.

I don't think THOR will personally kill him, but THOR is the one who will probably get the Infinity Gaunlet, since it must be wielded by a GOD, and most Avengers are not Gods.

Since it's clear that both Capt. America and Ironman want out of their roles...........they will probably both DIE in the movie, setting up the final blow, that kills , or defeats Thanos.

It very well might be THOR who uses StormBreaker (his new hammer) ......to chop off Thanos arm, with the Gaunlet.......(Notice one side of StormBreaker is an AXE ---not a hammer) .....

but Ironman and Capt. America, will probably die in the final assault, giving Thor his chance and creating an opening.

So technically, Yes, in the end, it's probably THOR who defeats Thanos, but at the cost of his two friends.

It's no secret they want to re-boot Capt. America.......and Downey has publicly said he's getting too old to continue and wants this to be his last Iron Man appearance. .....so no doubt both characters will go out in a blaze of heroic glory........especially considering how they became such hated mortal enemies in recent films............it will be how they patch things up.....and bring them back together...........joining forces to defeat Thanos.

as always the Democrats