I don't care for the thread itself, but if we can have a speculation thread for Iron Man Mk 45 and Ultimate Ultron, then having an Iron Legion thread shouldn't really be causing this much ruckus. I mean, being an IM armor, it has just as much chance at being made (if not more) as Ultimate Ultron, the latter of which hasn't even been acknowledged yet by other companies (both in name and design), save for the one Lego figure.
Personally I dislike speculation threads. I know people made threads for Mk 45 and Ultimate Ultron because people kept bringing them up in the Mk 43 and Ultron Prime threads, but the same could be said about the Ultron Sentries and the Iron Legion, both of which have received even more publicity than either Mk 45 and Ultimate Ultron. The amount of times I've seen people talking and making photoshop pics of the Ultron Sentries in the Ultron Prime thread is pretty staggering, even when the discussion had nothing to do with the latter, yet I don't see anyone making threads for the Ultron Sentries.
My personal principle? If HT teased an image for a potential figure then fire away and make a thread (e.g. Vision, Quicksilver, Scarlet Witch) but if not, then I honestly don't see the point behind making a speculation thread especially when we can just talk about them in the general AOU figure thread (yeah, that includes Mk 45 and Ultimate Ultron).