I'm pretty sure it's a who unless the Wreckers themselves have got it wrong - Topspin and Pyro at least think they're rescuing a Transformer known as Aequitas. And if so, it's either someone big or on a very high shelf.
Fantastic issue. This is Transformers comics as they're meant to be.
it occurs to me...
Rotorstorm was a member of the new Wreckers. Rotorstorm was later repainted as Machine Wars Sandstorm. Sandstorm was a member of the G1 Wreckers. So was Rotorstorm deliberately chosen by IDW for this reason or is it all a coinkidink??
Well I read the first three issues today. As a one off miniseries it's really quite enjoyable if quite thin on the ground for plot and characterisation.