No new ideas presented here. I just remember that, back when I was first learning about regression, one of the things that stuck with me was seeing how the top batting averages in the league in Year X looked in Year X+1, so here's a similar concept with a different, more contemporary statistic. What you see below are the top 20 players in WAR in 2008 and how they then did in 2009. Accompanying them is an old friend.
Please try to keep this in mind if you notice that Franklin Gutierrez is having a tough time repeating as a superstar.