Play video content EXCLUSIVE

Stone Cold Steve Austin just touched down in New Orleans to make an appearance Sunday at WrestleMania XXX ... but when it comes to what he'll be doing, the legendary wrestler remains tight-lipped.

Stone Cold hightailed it to N.O.L.A. this morning for the 30th anniversary of WrestleMania -- which airs live on the WWE Network -- but refused to tell a photog at the airport what role he'll play at the event.

Austin hasn't been to Mania in 3 years ... and we're guessing he didn't fly all the way across the country to NOT Stone Cold stun some jabroni.