Would you want Michael Keaton in the JLA movie ?

[CFE]

I remember when WIZARD did a dream casting of an animated "Kingdom Come" movie:

Harrison Ford as the voice of Superman
Sigourney Weaver as the voice of Wonder Woman
Michael Keaton as the voice of Batman

CFE

 

[Ledger Joker]

Tim Burton's Batman was a hero that logically wouldn't team up with other heroes. Unless they convinced him that his skills were needed for a mission here and there, I don't see Keaton adventuring along with Superman, Flash, Wonderwoman, Green Lantern, etc.

If the script has him as a full-time member of the Justice League, no.

If the script has him as a part-time member of the Justice League, then yes, on the STRICT CONDITION that the directors and writers know how to pull the ropes to create an excellent movie.