Hypothetically, could this version of the character appropriately fit the tone of he Arrow/Flash Universe?
I haven't done my research, but I thought I read somewhere that there was mutual talent involved in both, and the idea of Reynolds having a cameo was considered.
I'm admittedly uncynical about my big-budget fiction. For all it's flaws, I enjoyed the Green Lantern movie. He's an established live action character with ties to both Green Arrow and The Flash. There's no plans to use him in the MoS universe. So. Could be cool.