Some of these were gathered from computers at Wal-Mart and Target.
But according to this article at action-figure.com
http://action-figure.com/index.php?name=News&file=article&sid=24538
back in February, Playmates planned on at least four waves.
Wave 1 (that we've gotten)
Wave 2 (July through September)
Wave 3 (for Christmas)
Wave 4 (early next year)
Whether all these come out or whether plans have changed, it's hard to say. An Orion figure was said to be in the works. They also said several more play sets are planned if the first ones sell well. Of course we know that these are on the way:
Utility Belt Role Play Toy
Narada ship
These figures were found in Wal-Mart computers for the 3.75'' scale. Not sure if these are all Wave 2 or not:
MCCOY / ENTERPRISE 43377-61756
CHECKOV / ENTERPRISE 43377-61758
SAREK 43377-61762
GENERAL AYEL 43377-61764
KIRK / CADET 43377-61765
SPOCK / CADET LEADER 43377-61766
TBD 43377-61767
UHURA CADET 43377-61768
SPACESUIT KIRK 43377-61770
SPOCK VULCAN 43377-61771
TBD2 43377-61772
KIRK FROZEN PLANET 43377-61774
SULU SPACESUIT 43377-61775
POLOARILLA 43377-61776
The figures were found in Target computers for the 12'' range:
Chekov in Enterprise Uniform
Uhura in Enterprise Uniform
Nero
Sarek
Scotty in Frozen Planet Outfit
Of course all of this is just rumor until Playmates officially announces it, and things can change. For instance, Nero was supposed to be part of Wave 1 in the 12'' figures but got pushed back for some reason. There were also some rumors that one of the future playsets would be Nero's drilling platform.
I certainly hope all of these get made! I'm loving this line.