once 6th Edition is launched, the entire multi-wave concept for miniatures may be over from Games Workshop. There is talk that the Chaos Marine codex will launch with all its units, or at least have them shown in pictures in the codex.
Please remember that there has not been an official announcement, and until then, these are all considered to be rumors.
There has been a lot of chatter being posted about the end to waves. I want to chime in and say this isnt entirely accurate. But the way gw is thinking about wave releases now will make more sense to the community...I think.
On the wave thing ...
I guess all they need to do to protect their Ip is to release everything that is new/been added before or with the codex and then the later waves can be stuff they are replacing/updating. 3 waves; Before, With and After. Something big : Before, rest of the new stuff : With, updated stuff : After.
via Faeit 212
Some whispers I have been hearing. That Chaos Marines will get everything needed in a single wave at the time of the codex. Although I have been hearing that there will also be a finecast upgrade on much of its older miniature line a month after the codex release.
Games Workshop may with the coming of 6th edition make sure that every new codex entry has all its new models in line, and release them all at the same time of the codex. This would certainly allow for models to be redone, in fact, they may even wait to redo models, or upgrade metal models at a later time.