Origins Collection will be offered as a 'soft' bundle on Steam starting Jan. 19th. Purchasing the OC package will simply add RE1HD and RE0HD as separate apps on your library list; in other words, there isn't a separate entry for Origins Collection within the Steam library list.
With that said, you technically can pre-purchase OC by getting RE1HD today (and start playing it right away) and pre-purchase RE0HD separately
We will also pre-load RE0 closer to the release date.
-wbacon
So, if I'm understanding this correctly - If I have owned RE1HD since release, and Preorder RE0HD, it would be exactly the same as pre-purchasing the OC? Does this also entitle me to the Nurse and Cody Costumes?