Yes, "One and done." One crew member per series, and then "we're out of here!"
DS9: Sisko
Voyager: Janeway (OK, Seven of Nine)
Enterprise: Archer
Next Generation: Picard
These new figures were great, far above the previous level, to the extent that you can't even place any of the previous wave figures with this most recent wave without them looking out of place. And then what? We're still waiting to find out. I don't believe that the series was called "Star Trek Captains," was it? If so, I don't think I was the only one who missed that. I went out and hunted down these sets, several in duplicate, in the hopes that this was going to be the start of something great, which it should have been.
I hope we get some good news on this front, but it sure doesn't sound like we're going to.
Rex!