WWE announced Friday afternoon here on dot com that the company would make a "special announcement" on Monday at 12 PM EST. The announcement will be streamed live on dot com.
While WWE is keeping the suspense by not revealing what they are announcing, it is stated that Vince McMahon, Triple H, Stephanie McMahon, WWE Champion The Rock and John Cena will be on hand.
I do not have 100% confirmation but I would assume given the rumors it has to do with the location of Wrestlemania 30. The belief, fueled on Friday by Saints quarterback Drew Brees, is that the show will be held from the Superdome in New Orleans, LA.