Oh, for sure! Thanos squared off against the Avengers multiple times in the comics. Their clashes were intense and had a huge impact on the comic universe.
He would bring a whole new dimension of power. His magic could be used for offense, like powerful curses, and defense, such as protective enchantments. The Avengers might be initially skeptical, but once they see what he can do, they'd welcome him. For instance, he could create a magical shield around the team using a spell like 'Protego Maxima' which could withstand Thanos' attacks better than their normal shields.
It could strengthen their relationships. When the Avengers watch Tony fight Thanos, they see his courage and determination. This might make them respect him more, especially those who had doubts about him before. For example, Clint Barton might see Tony in a new light and be more willing to work with him in future battles.
In Endgame, the Avengers try to reverse the Snap. They come up with a time - heist plan to get the Infinity Stones from different points in the past. There are many emotional reunions and sacrifices. In the end, they are able to bring back those who were snapped, and Iron Man sacrifices himself to defeat Thanos once and for all.
Avengers: Endgame's backstory encompasses a lot. It ties together the loose ends from previous installments, showing how the heroes were affected by past battles and how they prepared for the ultimate showdown with Thanos.
Sure is. The movie draws inspiration and elements from the rich world of Marvel Comics, specifically those related to the Avengers and their adventures.