Not only did he break the news of a new collaboration between Chance the Rapper and Yeezy, but the handwritten copy of the SWISH tracklist he's holding differs from the one Kanye himself posted. As Pigeons and Planes notes, the second song on Big Boy's list features “Father Stretch My Hands Pt. 1 Pt. 2." 'Ye's initial post did not contain any information about multiple "parts" to a track, but as a Mike Dean tweet adds, "it's all about parts."
As far as the music Kanye is working on with Chance, we'll just have to wait and see. Maybe they have something cooked up for SWISH or a GOOD Friday release?