Wow, that's a pretty good rundown, dto. Admirable job, but you left out the Lee/Fallen Angel stuff and
*ack* her disgusting and misguided affair with Earth-0's evil Lex (how easily we forget!). :roll:
The Pocket Universe Earth was destroyed by the three Phantom Zone criminals, who were then EXECUTED by Superman
Proof positive that said character wasn't Superman, since Superman doesn't kill. Further, post-Zero Hour, the Pocket Universe never existed, so Matrix had no origin, hence she couldn't have existed. We therefore had a character who wasn't Superman, who had executed 3 criminals that never existed in a universe that never existed, yet who still agonized over it; and a female-like creature who never existed either. Anyone who tried to buy into all that deserved whatever they got.
Now, however, we have the post-Birthright continuity, where Superman and Supergirl have always been Kryptonian cousins - just as they've been since 1959. You're talking about the
pre-Birthright "continuity" - if that's what you want to call it.
Anyway, Great Rao's presentation of
Identity Crisis reads Great to me!