Not looking too forward to this although I cannot deny some curiosity:
Probably a renter rather than a purchase. Haven't really embraced any of the DC Animated films since Wonder Woman, which wasn't all that strong. Actually, Green Lantern: First Flight was pretty good, now that I think about it, but I haven't bought any of them since WW.
Anyway, time will tell. Released on July 27th, if I'm not mistaken.