If there ever was a spontaneously combusting Pianta, I'd be very happy. Piantas are the most disgusting, selfish creatures in the Mario universe. They care nothing for Mario even though it's clear as day the imposter looked nothing like him. But I guess that just shows how pathetically stupid they are.
*ahem* Anyway, the new stage I really want to see might be along the lines of a haunted mansion type thing that coincides with (da, da, da da) Luigi's Mansion. Ghosts flyin' around with E. Gadd in the back causing unintentional havoc would be just plain sweet.