Detroit's absolutely singular Danny Brown has been building buzz almost from scratch for Atrocity Exhibition, his fourth studio album, coming a full three years after Old. We've heard a few intriguing tracks so far, and we're definitely counting down to the Sept. 30 release, but today's drop is set to put us all on red alert.

Because Danny Brown got Earl Sweatshirt and TDE's very own Kendrick Lamar and Ab-Soul on the same track. Listen to "Really Doe" above.

Rap fans may be getting déjà vu, thanks to Danny and Kendrick having appeared together on "1 Train," A$AP Rocky's also-six-minute-long posse cut from 2013.

Get Danny Brown's fall tour dates and Atrocity Exhibition tracklist right here, then watch the rapper walk the streets of NYC with Fuse: