Wonder if that stage is like Mushroomy Kingdom, and it can randomly be the other DK levels. Doubt it, though, since that is the most interesting level.
If that 27 Assist Trophies thing is true, that's pretty lame. Especially since there are almost 600 regular trophies. Would it really take up that much space on the disk to add some simple skeletons, scripts, and hitboxes for a couple dozen of those trophies?