(Anyway, why are people so against the idea of a new type?
We're not. We're against the crappy reasoning that people are giving for it. That they haven't revealed a Pokemon's type is not good reason to believe that it will be of a new type. They didn't reveal what Reshiram and Zekrom were at first either, and everybody swore up and down they would be Light- and Dark-type respectively or else why not just tell us?
My NIDOKING brings all the boys to the yard: http://goo.gl/ExAoe