I have a close and confidential source who has spoken to Beck Campbell, Mitch Mustain's mom, just five minutes ago from this being posted. Mustain is NOT returning to the Razorbacks. He is returning to the UA for this semester to attend school. He will do so on his own, no longer on scholarship. The reason is, there has not been enough time for Mustain to completely explore his options. He'll go through the recruiting cycle again during the semester while going to class.
Crazy rumors of Mustain returning to the team, a team meeting about it, anything else along those lines were just that: rumors.