Fear not Bat-dorks, Ben Affleck is going to be a GREAT Batman ... so says one of the most respected guys to ever don the cape and cowl, Michael Keaton.
Keaton -- who famously danced with the devil in the pale moonlight back in 1989 -- was leaving Toscana in Brentwood last night when he sang Ben's praises ... telling TMZ, "He's gonna be great."
FYI -- Warner Bros. just announced that the untitled Batman & Superman joint movie (starring Affleck) is scheduled to hit theaters on July 17, 2015 ... so, we've got about 2 years until we can see if Keaton is right.
Affleck Gets My Bat-Blessing
8/29/2013 6:30 AM PDT BY TMZ STAFF
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