Snoop Dogg confirmed earlier this year that he joined forces with BTS for a collaborative track, although we don't yet know whose album it'll appear on. Since we do already know that a track with Snoop Dogg's contribution is in the works, we can't help but wonder if this anticipated single will land on "Proof." There's also the possibility that it'll end up on one of the members' solo releases.
Additionally, BTS announced that they will perform a live "Proof" showcase releasing on BTS's anniversary, June 13. The poster for the announcement teased a "special guest," though not much detail was given beyond that.
The same day, Anderson .Paak changed the caption on his photo with some of the members of BTS to read, "To be continued," which has fans thinking the Silk Sonic singer may take part in the performance, which was filming while BTS and Silk Sonic were both in Las Vegas in mid-April.
Upon the release of "Proof" on June 10, it was confirmed that there are no new collaborations on the album, but that doesn't mean a collab can't come out of one of the boys' many performances of the new tracks on the album. Only time will tell.