Marvel and DC Crossover. Will it happen?

There have been so many fans asking about Marvel and DC Crossover. Will it happen?

Marvel and DC are the most prominent comic book publishers. They also have their own production houses (Marvel and DC Studios) that adapted many of their comics into animation, Tv, and movies. Both Marvel and DC have had a humongous fan following worldwide. 

Fans have been waiting for crossover characters from both studios for a long time, imagining batman and superman standby stand with wonder woman and Captain America.

James Gunn, the director of Suicide Squad and Guardians of the Galaxy, recently dropped a hint about the potential crossover.

Working for both fandom, James Gunn said he already spoke with Marvel and DC people and doesn't think it can't be done.