You guys are thinking too unimaginatively!

Like, she could do a WHOLE NEW SERIES with WHOLE NEW CHARACTERS set in the same world! There will probably be peripheral views of the GT and other influential characters. But I'd love to see a new series, and like WK mentioned, about something other than Hogwarts.

And I think that JKR is creative enough to make a whole story without needing to lean on the actual crutch of her original characters. I mean, she's doing it with Fantastic Beasts!