I would like to point out that that picture of Power Girl, a DC Comics character, has the Marvel logo in the lower right corner. Whoops.
Anyhoo, apparently leading the parade of stars is Adam West (Batman), Julie Newmar (Catwoman), and William Shatner.
I have a copy of the Star Trek video game for the Atari 2600 signed by Sam Palahnuk, who created the original arcade game. I'm not sure I want Shatner's sig on it (after all, for me, Palahnuk's sig is the important one), and there is the question of how much Shatner will charge.
Just food for thought is all....