No doubt after Glee The Music's special Myspace premiere of the entire "Glee The Music, Christmas Album", people are speculating that the upcoming Christmas episode might feature Sue as everybody's favorite Grinch. (Listen to "You're A Mean One, Mr. Grinch" yet?)
Whether the entire Christmas-themed episode will be a spoof of The Grinch or it might just be a showcase of Sue "destroying the spirit of McKinley" (sounds like Sue, doesn't it?), it's hard to tell. But it seems likely.