T. Boone Pickens -- Cowboys Will Win Super Bowl ... But Not w/ Tony Romo!

Legendary billionaire T. Boone Pickens just made one helluva prediction -- THE COWBOYS WILL WIN THE SUPER BOWL ... but it won't be Tony Romo who leads 'em to victory.

The 86-year-old business tycoon was out in D.C. yesterday when we started talking football -- and he told us the BEST PART of having the football stadium named after him at Oklahoma State.

And that's when asked Pickens -- who's made a ton of solid bets in his life -- to give us a hot tip about the NFL.

Check out what T. Boone has to say -- specifically about the QB situation in Dallas.