Thanos was stronger this time because Thor was weaker. Thor was the one that almost beat him the first time and the last 5 years took a huge toll on him whereas this Thanos was just starting on his quest. He was fighting a beaten down Avengers while he was fresh. He also went into the fight knowing he beat them already and it was as he said, "Inevitable". Oh I had a thought in the shower this morning. Ok, get your jokes in. Cap's trip to return the stones could be a cool movie by itself but returning the soul stone is special. It took a life to get it in the 1st place so what will Death say when Cap returns it? It took a life to claim it so does that mean returning it brings back life? Like Black Widow? Is this how she could return in a future movie?