I really have not heard too much about Flowers, but this Rivals article (behind paywall?) quotes him saying how UM is definitely one of his official visits. He's the top player in AZ, 4 stars, and ranked as the number 9 overall athlete on Rivals. The article also states that Flowers is in consistent contact with Coach Dews.....Looks pretty impressive.
here's one vote for "John Beilein's head in a Futurama jar"