Hmm. I can't say if we'll ever see Gnawties (I
think that's the correct plural) again, although it's not out of the realm of possibility. They
were kind of cute in the first DKC, but their constant squeals and chirping made DK64 a nightmare.
Especially this bonus barrel where you had to be Klaptrap and lure them all into this tiny hole in the ground... yeah, oh god.
I think, with water levels this time around, Enguarde is a reality but no one else seems likely. Retro doesn't seem to be as much fans of the characters as we are (the fanbase, I mean.)