Oh, man. Just filled out my bracket with a Duke-ND title game (Duke winning, of course) and I'm getting pumped just thinking about this awesome scenario. It'd be pretty sweet to have two days of leadup to the title game with tons of media coverage of the mentor vs protege story.
A quick word about coaching trees. Obviously, Coach K is not going to have as successful a tree as Dean Smith. So much of what makes Coach K successful is tied up in things that he can't transfer to other people. His personality, his mastery of psychology and ability to read team dynamics and individual emotional swings. Coach K is a natural born leader and Dean was a mathematician (literally a math major at Kansas) with a technically proficient mind who devised an incredible basketball system that he could teach others how to use. (And I'm not saying Coach K isn't technically proficient and Dean wasn't a leader; obviously they were both well-rounded but I think there is a core difference). Dean's tree includes Roy who has won 2 NCs, Larry Brown who won an NC and NBA championship, and even Gut who made a Final Four.
Still, it would be pretty sweet for Coach K to have one protege in Brey make it to the Final Four. It would give Coach K a leg up on Roy in the tree department; afterall, being only 4 years apart in age, Coach K and Roy are actually peers whereas Dean's peer was really Coach Robert Montgomery Knight. And if Brey makes a Final Four, then all of a sudden Coach Knight's tree goes 3 levels deep with Final Fours while Dean's tree only goes 2 levels deep (unless you count Self, but he only spent 1 year as a grad assistant under Larry Brown compared to 8 years as an assistant at Okie St under Sutton and Hamilton). RMK ---> Coach K ---> Brey would be a pretty meaningful lineage. All coach motion offense and emphasize player versatility.