The full teaser is at the bands website, slipknot1.com
As you can see it's a wicked and creepy montage of past masks. The video ends with 0516 displayed which leads us to believe the new masks will be revealed this Thursday.
'Slipknot are gearing up to head out on tour in a few weeks, and they've just announced a performance on Jimmy Kimmel Live!- not the typical Kimmel rodeo. The group's appearance on the late night show is scheduled for Friday, May 17 at 11:35pm ET.' - via loudwire
Corey Taylor has also updated fans on his recent knee surgery.