Both SEGA and Marvelous launched teaser sites with countdowns. What could they be about?

Developers Marvelous have put up a site with a cryptic image and a countdown and SEGA has decided to do the same! SEGA's teaser site only manages to give out a little more info, as it says "Takao Myoshi produce" on top of the page. Takao Myoshi was involved in several big name titles like Sonic CD, Christmas NiGHTS, Phantasy Star Online and Phantasy Star Universe.

Are the projects linked? Do they even have anything to do with a Nintendo console? Is the mushroom connected with Mario or is Takao Myoshi just interested in produce? What about those triangles we know so well as the Triforce? Maybe it has something to do with Harvest Moon or Rune Factory? Is the butler really the murderer? Too many questions, too little answers, so stay with us!