It has been known for quite a while now, that buyers of the Collector's edition of Street Fighter IV will get a set of 5 alternate costumes. What was not clear though was which character's alternates the CE owners will get, or if we can download any 5 alternates we want if we buy the CE.
Well, we now have an answer. The Collector's edition will come with the brawler pack of alternate costumes, meaning you get the alts for Zangief, Honda, Abel, Elfuerte and Rufus.
I was hoping for some exclusive alts, but oh well! can't complain, game is amazing as is.
source: SRK Forums