Very good news, indeed...
I bought Madworld 2 weeks ago and it's really entertainig (sadly for the game, I bought muramasa one day earlier and I haven't played that much... Madworld is good, Muramasa is better...). It has plenty of humour... the same kind of humor HotD:Overkill.... and my favourite type 
Anyway, I think its sales are really good, because although I really like the game, it is awfully niche... I mean, it is black, white and red, and incredibly gory... what's more, the fun of the game is being that much gory... and well, the game is quite OK, but development costs seem to be very low...
I think an evolved Madworld has potential to be a great game... Adding co-operative modes, fixing the camera, add some extra movements and double the lenght and it will be the perfect sequel and an amazing game...
