I assume the worst because Johns is attached to this... since it means its going to be pandering to his personal head canon like it always does because DC does not have the balls to tell him how destructive and idiotic some of his ideas are.
Also, from his previous run on the JSA, it just cemented why this team needed to be on another planet. The Justice League leaves nothing for them to do other than put out small fires and mentor a bunch of up and coming heroes who aren't big enough for the Teen Titans.
As for Wally West... that was a fundamental mistake done by DC thinking their readers are so stupid they just jump on the bandwagon with the same name as the thing they've been asking about for years. And yet, now that the real Wally is back... I am kinda wating for the Titans book to actually move past that. You wanted a focus on Wally West of old, do a mini-series or add him to the Flash book, dont let him suck out everything from a team book composed of mostly under-developed characters.
I don't disagree with Lee, multiple Earths should mean multiple versions of the different characters. And I agree that Earth 2 was mostly ruined after James Robinson departed... I'm feeling it right now again with Abnett at the wheel, but I really do fear DC is just going to throw it all in the fire once more just so Johns can have his sandbox back.