Ah, Uncle Mxy, if only. SECRET IDENTITY was Busiek's nod to the Earth-Prime Superboy, not the EPSB himself. It'd be nice to think that he's out there somewhere, happy in the pocket universe created by Alex that contains both Earth-2 and Earth-Prime, maybe even Earth-C and Earth-C-Minus.
One can dream.
Dto, your ideas are not only interesting, but frightening as all heck. If we consider that Earth-Prime is the 'hub' of the multiverse, and that if something is created there it's reflected in the contemporary DCU. . .well, that's a chilling thought. A creative individual could wield metafictional powers there on a level that'd make the Anti-Monitor look like the Turtle.
I can understand why DC did what it did; nothing boosts sales like surprise revelations, and what's more surprising than finding Superman as your bad guy? But this was abomination. Killing Superman-2, the original Superman from the Golden Age, in a death that makes Kirk's last gasp after falling off a darn bridge seem epic by comparison, and having both Superboys either die or go insane. . .it was crass. It's shaken my faith in the editorial hand at DC's rudder. I always assumed that DC would never go the darker route of Marvel, but you know what happens when one tends to assume things.
-Def.