I think you're being a little Chicken Little-ish when you say you know Savage and Serpias will "never" show up again at your stores.
Yeah, there is definitely a frustration factor, but honestly the TRU's around here are funny with their TCW waves. Some waves show up in plenty, others I have literally only seen once never to be restocked. I've only seen Colt twice at all the TRU's around here, for instance. I just don't feel like I can take it for granted these guys will show up again outside of this latest promotion anytime soon.
That's not to say the figures won't be available elsewhere, I'm sure they will, but that will take awhile and this TRU promotion was really the best chance to score these for the foreseeable future. The scene around here otherwise is really dead.
I did see an El-Les and Comm, Wolffe at Walmart tonight, but they did not appear to be carry forwards from any of the new waves.