https://screenrant.com/flash-movie-ben-affleck-batman-filming-september
Another round as Batman for Ben.
https://screenrant.com/michael-keaton-batman-return-flash-movie-nostalgia-avoid
Just having two different versions of Batman in the same movie could make for a very popular production.
https://screenrant.com/batman-dceu-future-explained-keaton-flash-batman-beyond
https://screenrant.com/batman-flash-bigger-threat-superman-flashpoint-prepared
https://en.wikipedia.org/wiki/Batman_v_Superman:_Dawn_of_Justice
