I believe all models from 1st edition have been updated at this point. The exceptions are those that were upgraded to masters (Misaki, Hamelin the Ratcatcher) or became named characters (steamborg executioner -> Howard Langston, drill sergeant -> Dashel or GG captain, may be a few other examples of this too), and avatars (more info on those may be in the wave 3 beta). But as said above, check the faction deck listings to see which stat cards are in each deck.
If you mean which models have been re-released, I would suggest checking the online store at Wyrd, or go to warstore to see what is up for preorder too.
Or if there are specific ones you want to know about ask here.
Last edited by morella888; 02-22-2015 at 12:05 AM.