I would assume that the Hot Cell is going to come with surface OOB since the No RUles Pearl and supposedly the No Rules Exist are polished. That should mean it's a solid or hybrid cover, and with two solids already in that line a hybrid makes the most sense.
So a hybrid with surface OOB. Just don't know how strong of a cover it is though, that makes all the difference. Would be interesting to see if it's way up there and Roto Grip's version of the Gauntlet/ Inception Redux. Don't really need another mid/low range high-end ball with the No Rules Pearl and No Rules Exist (assuming what we think we know about the latter is true).