Why is the Flash not in the team of Avengers?

Flash is part of DC universe whereas Avengers is of Marvel universe. Flash (comics) Avengers (comics) And in DC universe, Flash is a core member of Justice League. read more

Because flash is not a marvel character. He is a DC character and he is the most powerful superhero team in DC that is the Justice League. Just like marvel has its superhero team- Avengers, DC also have its superhero team- The justice league and as flash is a very powerful character, he is in the justice league. read more

In the new ongoing Great Lakes Avengers series, the team was made official members of the Avengers due to a legal technicality. A few issues later, their membership was revoked. read more