So far Air Master and Dozer Master have not been identified yet. I assume that Air Master is either Silverbolt or Air Raid. Tank Master could be Bludgeon. Marine Master could be Broadside.
Amazon.com: Takara Tomy Transformers Transformer United EXP2 "Dozer Master VS Air Master" (Japan Import): Toys & Games It's more of the powercore combiners figures. Seems to be that's just their names, and the others will just be other powercore molds. Marine Master could be Searchlight/Windburn-based and Tankmaster will likely be Steelshot-based. Grimstone is Glyme Master, by comparison. http://www.amazon.com/Takara-Transf...F8&qid=1352697603&sr=1-2&keywords=United+EXP2
He doesn't mean which sculpts they are, he means which pre-existing characters Hydra will identify them as in their bios. For example, Roadmaster is e-Hobby Detritus, Grimmaster is Kakuryū from Victory's Dinoforce, Racemaster is G2 Rapido, and so on.
I'd put odds on Airmaster being a third member of the Autobot Air Strike Patrol along with Blaze Master and Treadshot. Seems too coincidental that two of the four are already in the series. I'd put odds on Marine Master being a reincarnated version of Seawatch / his Victory equivalent. Tank Master, possibly he could be that green tank from the Decepticon military patrol (Dropshot's teammate)
Oh dear, please don't let Amazon make this a thing. It is most definitely Grim Master; "Glyme" is an incorrect translation of "グリム" (Gurimu). The intentional homage to Grimlocks name that was also in Grimstone's name is pretty clear, especially considering Glyme means nothing that could relate to the character. I hope this doesn't get as annoying as all the people who called the AM Vehicon "Beacon" right up until it was released...
I dunno, I find the mistranslation of "glyme" to be pretty funny. I think I'm going to go with that. He'll fit right in on the shelf next to New Soundwave and Billy. And sorry, I think Marine Master will probably be based on Undertow as well, I don't know how I forgot about him, especially since the Searchlight mode was already used for Blazemaster. I think the obvious choice for Undertow/Marine Master to be based on would be Manta Ray, given their similar altmodes, and the tendancy so far for the line to tue into late-G1 / G2 characters.
air master could be: Cosmos Powerglide Jetfire skyjack? marine master i would say is that boat from G2 of similar make. cant think of his name maybe mantastorm?
Sorry for no responding earlier, Assaultmaster is so Double Clouder from Masterforce. Marine Master is G2 Manta Ray and Tankmaster is Grindcore from Simon Furmon's IDW run. Which leaves Buildmaster is Scrapper.