Why would the name of a game from a developer other than Nintendo give anything away for the final name of the Rev? The name could be RS but it could also be a lot of other names, I don't see the connection between having a game called Red Steel and the name Nintendo RS. The DS didn't have a game that used it's name did it?
If it was called Red Steel RS then yeah, I'd have to agree but it's just Red Steel. It's just the name of a game, if they'd have called it "Steel of Redness" would you be saying the Rev will be called Nintendo SoR?
Nintendo RS is still a good name for the system though, and could well be the final name but I wouldn't base that on this game's name.