He always said that if there was a sequel, it'll be on the next Nintendo console.
NMH2 was an infinitely better game than the first, the first game was kinda poor but had some cool bits that made it sort of worthwhile to play. NMH2 took out the crap and made everything a lot better. I'm glad he is still sticking with the series, doesn't sell that well but it does enough for it to continue I think the last he talked about was having you not play Travis this time or something. Also hopefully this'll not use the wiimote, I was fine with jiggle gameplay with a lot of games on the Wii but this series was a bit of a chore however wiimote+ I'll be happy with.