Yes, Ricky Carmichael (Suzuki) is retired from Supercross, but will ride the first few Outdoor AMA motocross events this year (I believe the first five races are the tentative plan). If you have not seen Ricky Carmichael race James Stewart (Kawasaki) outdoors, you must attend one of these events.
Will we ever see two riders as fast as Carmichael and Stewart outdoors? Will we ever see two riders that fast battle one another straight up? These are epic battles between two of the greatest riders of all time (Carmichael is the greatest rider of all time).