As for Stargirl herself, as a solo character she obviously belongs to Johns not just because he created her but because he created her as a way to honor his deceased sister. That makes sense to me, though it doesn't mean she can't be in other titles. Stargirl #1 though would have been by Johns and he's too busy messing up DC TV and movies (like WW84) to write comics. His writing on Titans has been atrocious, I found the Stargirl special to be a bore and I'm beginning to think he's already aged out the way that a Levitz or Claremont or Wolfman have. Which is a shame. I loved everything he was writing before he moved over to the film/TV side--I was really upset that the great things that were set up in Brightest Day were preempted by New 52.

But I don't need to see him on Stargirl or JSA going forward. First, I don't need a Stargirl comic and second I don't need to see Johns return to JSA well. I'd much rather see someone else do that. My first choice would be Brad Meltzer, though I know that's highly unlikely. I don't think a writer has to be a 'good fit' for any property. A great writer is a great fit for any property. Writers and artists, not characters, make for great stories.

Apart from having missed the JSA and the Fab Five lineup of TT (I do not consider the NTT lineup to be the classic one, though I am fond of it), I don't particularly care which characters have or will show up. I only care that we have great creative teams writing whatever they want to write, especially now that editorial interference is no longer a thing, which it isn't. Editors are largely getting out of the way under the new regime in order to let great creators create freely.