Zod, Braniac/Lex Luthor, Darkseid.  In that order.  All very awesome.  I just wish that Spacey could come back to act as Luthor.  He was the best part of that last Superman movie with Routh.

As for a CGI Darkseid I guess it would work.  The CGI characters in 300 were very convincing.  If it was that good a CGI Darkseid would be RUTHLESS.  But Duncan still has to do the voice work!  His voice is what would make it super menecing.

PECTACULAR! - if you are in to that kind of thing (not that there is anything wrong with that).

Axia, and Wise, I think you're both right!  An actor like Michael Clarke Duncan could be used as either a background or voice work with CGI.  That's an idea.