It’s not “official” yet, but it’s completely obvious. I hope the people behind this weren’t expecting people to be oblivious, though I doubt they were.
The tour’s website BlackDiamondSkye.com (again, obvious) just has a timer counting down for Thursday, April 29th. I’ll assume that’s when the tour dates will be posted. A promo video was put out online featuring cut up clips and scenes from the bands’ videos and garbled music samples:
There’s no doubt about it, Alice In Chains, Deftones, and Mastodon will be touring this summer, most likely across North America. No word yet on any opening acts, but I’m sure everyone who cares will be content with just these three bands.
More info as it comes in. I’ll try to keep you posted.