I guess I'm the first to look up ADVENTURE COMICS #423, but it strangely fits with the earlier 423s mentioned. Take a look for yourself:
BTW, this probably doesn't need pointing out, but the person (Supergirl) who fingered Superman as the traitor HAS BEEN DEAD SINCE 1985!!!
Suspicious, isn't it? Who WAS the Anti-Monitor working for, after all?!? Strange that he never appeared before or after the CRISIS, either... could he have been... paid off? The only proof we have that he is even dead is the word of... you guessed it... the Earth-2 Superman... WHO NO LONGER EXISTS!
Can't you see a pattern, people! It's a riddle wrapped in a mystery inside an enigma! WE'RE THROUGH THE LOOKING-GLASS, PEOPLE!!!
