Silicon Valley Comic Con releases slate of celebs http://socialmedianews.me/silicon-valley-comic-con-releases-slate-of-celebs Jeremy Renner ("The Avengers"), Nathan Fillion ("Castle"), Alan Tudyk ("Con Man"), Sean Astin ("Lord of the Rings") and Ray Park ("X-Men") will join previously announced guests Stan Lee (Marvel Comics founder ), William Shatner ("Star Trek") and Christopher Lloyd ("Back to the Future"). -