DC Universe #0 will ship between Countdown to Final Crisis #1 and first issue of Final Crisis. It's a 24 page issue witch a 50 cent cover price, written by Grant Morrison and Geoff Johns, plus art by stars artists such as Carlos Pacheco (Superman), Ivan Reis (Green Lantern), Tony Daniel (Batman), Aaron Lopresti (Legion of Super-Heroes) and George Pérez (Brave and the Bold).
This cover/page? drawn by Pérez features Superman and the original Legion, fighting some kind of Shadowdemons.
So, my wish has gotten true :)