HERE is a thread from Battle.net forums, and I posted a picture of the in-game message.
But can this be true? The post isn't by a famous Blizzard employee, and the in-game message has a date that just doesn't add up. The best support for Kaivax is that all of his posts are about support being done on servers!
Either way, I would say be prepared for a reset on Tuesday November 26th!