The dynamic duo took in "Justice League" Monday in L.A. -- and the looks on their faces indicate they at least liked it more than critics (not saying much, we know). 'Ye and Cudi have been reconnecting recently ... Kanye hopped onstage with him a few weeks ago in Chicago.

There's a rumor out that 'Ye will be producing Cudi's new album, something that hasn't happened since Cudder's 2008 debut. Cudi eventually parted ways with G.O.O.D Music in 2013.

We don't know if this was a break from the studio or just two pals catching up, but all signs point to justice prevailing ... for music fans.