Amazon has posted this short line of new info on the game's product page: (mariopartylegacy.com)
I remember being 8 years old — this was well before a complex system of tubes informed users of new info on games 50 times a minute, and where we walked uphill to and from the arcade — and virtually salivating with anticipation for the arrival of each and every issue of SEGA Visions. (blogs.sega.com)
And until such a time comes, we're still stuck with no new info on the game. (rdr2.com)