It's weird what I've been founding as rumors around the web... some are simply... hilarious... like getting Yoshi, walking into Bill's machine and warping to the Orange Islands, using those ????? items as surfboards (well, this is one's not a rumor, in fact
), and I heard of a lot of new cities and all that (maybe they were just the Beta maps...) Very interesting, indeed.
Let's hope you can manage to reproduce at least a good number of all the rumors around. At least it'll be funny to try this time and see THEY WORK!
Good luck!