Nine Inch Nails and Soundgarden celebrate two big anniversaries today as both The Downward Spiral and Superunknown turn 20 years old (which resulted in some animosity between the two bands back in the day). Now Antiquiet has compiled evidence that points to the bands going on a co-headlining tour this summer. First Live Nation leaked a listing for an August show in Dallas with both NIN and Soundgarden. Then fans found an auction that offered a Chris Cornell meet-and-greet at a NIN/Soundgarden show in LA. Yesterday, both bands seemingly teased the news with similar promotional Instagram videos. Thanks to the diligent work by fan forum Echoing The Sound in identifying the series of venues flashed in the Soundgarden clip, we have a tentative list of places the tour will be hitting this year. Check those out along with the videos below.

Red Rocks Amphitheatre – Morrison, CO
?Verizon Wireless Amphitheater – Irvine CA?
Nikon at Jones Beach Theater – Wantagh, NY?
Cricket Wireless Amphitheater – Bonner Springs, KS?
Xfinity Center – Mansfield, MA?
MIDFLORIDA Credit Union Amphitheatre – Tampa, FL?
DTE Energy Music Theater, Clarkson, MI
?Molson Ampitheatre – Toronto, ON?
The Austin360 Amphitheater – Austin, TX?
Shoreline Amphitheatre – Mountain View, CA?
First Midwest Bank Ampitheater – Tinley Park, IL
?Merriweather Post Pavilion – Columbia, MD
Farm Bureau Live at Virginia Beach – Virginia Beach, VA?
Woodlands Pavilion – The Woodlands, TX
?Gexa Energy Pavilion – Dallas, TX?
Isleta Amphitheater – Albuquerque, NM
?Aaron’s Amphitheatre – Lakewood, GA?
Hollywood Bowl – Los Angeles, CA
?PNC Bank Arts Center – Holmdel, NJ
?PH Live (Planet Hollywood Theater) – Las Vegas, NV
?XFINITY Live! – Philadelphia, PA
?Sleep Train Amphitheatre – Chula Vista, CA

Guess this is all water under the bridge…