But now, it looks like the first wave-- or four of them, at least-- are seeing a re-release exclusively through online retailers such as BigBadToyStore. Instead of individually-carded figures, however, the figures of Mega Man, Shadow Man, Elec Man, and Proto Man will be sold together in a four-pack for $43.99 (though BBTS is offering them for $39.99), and are expected to arrive in December.
In addition, Protodude has learned from a Jazwares representative that a "follow-up" box consisting of "four Wave 2 figures" should arrive in the Spring of 2010. Unfortunately, specifics were not divulged as to the identity of the Wave 2 figures, but we may be able to determine the remainder by looking at the back of the original Retro Rotos' box.
On the back, it featured the five figures which made up Wave 1: Mega Man, Proto Man, Elec Man, Shadow Man, and Guts Man. Since Guts Man isn't included in the first box, he seems to be a likely candidate for the second. In addition, the Wave 1 figures all contained "Build-a-Bot" parts to create a "Fully Charged" Mega Man, representative of when he charges energy into his Buster. That seems like a likely inclusion, since having a Mega Man would theoretically help the set sell better (or at least, it would at regular retail, where these figures won't be available).
The remaining two on the back of the box were two "Coming Soon" figures in Ice Man and Wood Man, who were never originally released, and were scheduled alongside he likes of Heat Man for a later release which never came.
Of course, that's all only a guess; we'll have to wait until Spring to find out for sure.