Didn't think of that, but still 'Charon' is hardly a name that when someone hears it would make them quake in their boots. xD
I don't think that they will go down the same road as platinum 'cos if Ghetsis and N double battles you then it would be outmatched because the opponents would have 2 legendary pokemon to defeat that are both stronger stats wise than Kyurem, plus of the whole N and Ghetsis' disagreement at the end and all that would complicate things... If it is a double battle it will probably be the player and N vs. Ghetsis and a new character becuase N wants to stop ghetsis at the end of the game.. It would be fun to battle with N rather than against him since (Spoiler:) he is actually a good guy in the end.