OT - "major" space science discovery to be announced Monday

A big-name US astrophysics research center has a "major discovery" to be announced Monday afternoon:

http://www.space.com/25066-major-astrophysics-discovery-announcement-monday.html

I scanned some blogs and, aside from jokes (like, "the aliens who stole the Malasian airplane"), there's no consensus of what the announcement will be.  Some of the possibilities:

-- An Earth-like planet -- something around Earth's mass, in the "habitable zone" of a star

-- Confirmation of the "multiverse" theory, which would hugely change our perception of just what "is" the universe

-- The nature of dark matter and/or dark energy, which if true would be like instant-Nobel prize for whomever figured it out.  Although, this particular center isn't likely to be home to that kind of discovery; that's more theoretical than observational.

OR THE HOLY GRAIL:

-- Confirmation of alien life detected via signals.

That last one would be so ridiculously huge, there's a suspicion no one could keep it under wraps.  You'd need it confirmed ten and twenty times over, and by then, someone would spill the beans.  And it probably wouldn't just be a "major discovery" -- it wuold be something like, "OMG THIS IS SO FRICKIN HUGELY IMPORTANT Y'ALL BETTER GET YOUR BUTTS HERE TO LISTEN ON MONDAY."  That's a couple degrees above "major."

Any guesses?