Could batman defeat thanos if he joined the avengers?

Batman is a DC Comics superhero who is not part of the Marvel Cinematic Universe. The Avengers are a team of Marvel characters such as Iron Man, Captain America, and Thor. Thanos is a major Marvel villain who has faced the Avengers in the MCU. Because Batman does not appear in the Marvel canon, there is no documented interaction between him and Thanos or the Avengers. Therefore, it cannot be determined whether Batman would be able to defeat Thanos as a member of the Avengers based on the available evidence.