Bloody-disgusting
Rob's own MySpace page
The Official Rob Zombie Halloween Myspace
Halloween/H2 Myspace fan pages
Daeg's official MySpace
Fangoria
Dread Central
Daeg's IMDB page
H2 IMDB page
There's a lot of heat from this controversial casting decision right now.
Batman has been recast 3 times now (including one reboot) since the 1980's.
Spider-Man is probably going to be re-cast after the next movie.
Iron Man will be the exception here, although there's only been one movie, and yes Downey Jr. did an awesome job, but it's still possible to recast him.
I mean within a series. Batman 1989-1997 is one series. Batman Begins 2005-Present is a different series. BF and B&R didn't work as well because of the replacements of Keaton, Burton, and Elfman. BF was good, but nowhere near Batman Returns, let alone Batman (1989). The less said about B&R, the better. :-) Val Kilmer was a good Batman in BF, but only second-best in that series to Keaton.
What if in TDK, Bale had been replaced? There may have been uproar over it. You can recast Rachel Dawes with Maggie Gyllenhall just fine, but recasting within the same series is hit-and-miss; you do not want to recast too many pivotal roles if the original performance was outstanding. There might be exceptions, such as having the Joker appear in a later installment within Nolan's universe; Heath Ledger can't help that he's deceased. It's sad and unfortunate, and it was one hell of a performance that deserved its Oscar. If the previous actor can still play such and such a role – and you're not doing a remake or reboot – why recast?
Young Michael Myers is one such key role whose actor and performance are very crucial to Zombie's series. 1978-2002 is one Halloween series, while 2007-Present is a separate series. If H2 were a reboot rather than a sequel, Daeg's exit might be taken better… or not.
Also about Polar Express, yes it's CGI/motion capture. What I mean is, if they can de-age Tom Hanks like that, why can't they de-age Daeg for H2? Technology can shrink him down in size. And more technology (or even helium! :-)) could help raise the pitch of his voice to a prepubescent level. I mean, why can't Rob take advantage of technology?