As discussed previously, the theory might be true but only at an amazingly low level of "need." A reason to be in the story before the reveal? Aside from all his character development (which might not matter if the only characters who actually matter here are the members of the eponymous Order, that is, in a comic written by someone who isn't Rich Burlew; remember the forum complaints when there was a subplot focused entirely on Bandana's becoming captain of the Mechane?), he saved one of the protagonists' lives already. A reason for him not to be immediately and casually revealed? I can't fathom how that claim, without "the guessing game is the reason," goes with anything Rich Burlew...or any fiction writer ever, has written.
Or to put it another way: Sure. He needs as much to do in the comic as his friend O-Chul, and as much reason not to have been revealed as Malack had to have not been revealed prior to the comic where he was revealed. I...am really not seeing any way those could point to any creature; he has both of them multiple times over even now, before the reveal.
I'm pretty sure it would be significantly more shocking than (looks in Crusher's guess post for Unoriginal's guesses, doesn't find any) than pretty much anything else that's been seriously proposed.