I agree with most of what you've said about Rock. I used to say the same thing on this forum last year before the game released, he'd never make DLC. To unpopular but then, who are the rest of the characters teased by the codewords? Are they all popular? Who is even left? Setsuka, Hilde and Yun definitely make sense in that regard but Rock, Hwang, Lizardman, Algol and Li Long do not. Basically what i'm saying is if 6 characters really are making the roster, some of them will definitely be unpopular anyway and i wouldnt put Rock at the bottom of that list. If the codewords dont mean who we think they do then i'm having a very difficult time placing who they should be, there really isnt a lot of possibilities left honestly.