Well, Wells had told Clark about Lois & Clark's descendants and Utopia, and most people have assumed that at some point, Clark revealed himself (or was revealed) as Superman.
In my scenario, with New Krypton joining the Federation, Utopia had arrived. (Okay, we all know it isn't, but Earth in that time probably resembles Well's idea of Utopia pretty closely.)
So now is the time for Clark to reveal himself (and some of Earth's lost history) to a world that now accepts aliens and differing abilities and where he's one of many like himself.
