How would you, the members of ComicVine think the Justice League would act if the old and reboot versions sat down and talked to each other?

Pretty much the much the same. They would make sure eachother's counterpart has the same ideals, after that they might discuss differences without getting into and sensitive topics. So Batman won't be asking his double if his parents are still dead.

currently im reading Grants run in JLA, and im up to #11 now i think, and it looks to me irs pretty much the same, dialogue wise