Maybe... maybe not...
Let's look at the anniversaries of noteworthy Wario games...
Super Mario Land 2: 6 Golden Coins (Wario's debut)
October 21, 1992 (Japan)
November 1, 1992 (USA)
January 28, 1993 (Europe)
Wario Land: Super Mario Land 3 (Wario's first own game)
January 21, 1994 (Japan)
March 13, 1994 (USA)
May 13, 1994 (Europe)
WarioWare, Inc.: Mega Microgame$! (the first WarioWare game)
March 21, 2003 (Japan)
May 23, 2003 (Europe)
May 26, 2003 (USA)
June 6, 2003 (Australia)
Game & Wario (the latest Wario game to date)
March 28, 2013 (Japan)
June 23, 2013 (USA)
June 28, 2013 (Europe)
June 29, 2013 (Australia)
November 26, 2013 (Brazil)
Looks like Wario might be confirmed either on January or March... this is just a guesstimate.
In a week, you say?
How does January 21 (Monday) or January 28 (Tuesday) sound?