Yes, let Miller make it. He's an oscar winning director who seems to care for the source. Remeber, there was a time when Burton and Favreau weren't big names either. I say give it a chance. I really want to see a GOOD LIVE ACTION JLA FILM ASAP!!!
I think that Adam Brody as Flash/Barry Allen is good.
Common as Green Lantern/John Stewart is GREAT, I wish they were using Hal Jordan, but he's getting his own GL film so using Stewart in JLA is fine by me, and Common's casting is SPOT ON, he looks just like the JLU Stewart, I love it.
Megan Gale as WW is good too.
ALL of the above casting is fine and and can stay, IMO.
It's the RUMORED Superman and Batman actors, too short DJ Cotrona and too tall and young Armie Hammer as Batman I have problems with. I think that (the rumored) Cotrona as Superman is the WORST casting decision out of the two, he looks NOTHING like Superman and is waaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaay TOO short for the part. He's only 5' 9' and would look like a dwarf standing next to Armie Hammer's 7 foot Batman with the cowl on. If that's who really was cast as Superman and Batman then they need to recast like yesterday. Someone older and shorter for Batman and someone MUCH taller for Superman.