JMS is on Superman and Wonder Woman?
I thought when JMS got the Superman: Earth 1 project, his mission to write Superman was resolved. But now you're putting him in control of the main Superman and the alternate Superman?
That doesn't seem like a smart move. It would seem more likely that people pick one JMS Superman project over the other. There is the possibility that there seems to be less differences between the two versions, because it is likely that JMS writes the core of the character rather identically in each version. There's a reason why Marvel didn't just slap Bendis on the traditional Spider-Man title after JMS left, beyond the chance that Bendis didn't want to write two versions of the same character.
The addition of Wonder Woman to his writing schedule makes much more sense, though. With how he seemed to have brought a new level of interest to the THOR title at Marvel, slapping him on to the DC character that deals with a pantheon of gods seems to be a no-brainer.