Looks like it is for real...
http://transmoto.com.au/rv-race-2015-mx-world-championship/
“This is certainly not a surprise, but it is now official: Ryan Villopoto will start the World Championship Motocross 2015. On the occasion of the exhibition in Cologne, staff Kawasaki used the launch of its highly publicised Ninja H2 to announce to the press the arrival of multiple champion AMA Motocross and Supercross in the Monster Kawasaki KRT next season. A big challenge for Ryan Villopoto is the first great American champion next challenge! This should give more spice to the World MXGP, it is looking forward to the showdown with multiple world champion Antonio Cairoli or with the official Honda HRC Gautier Paulin future.”
http://transmoto.com.au/rv-race-2015-mx-world-championship/
“This is certainly not a surprise, but it is now official: Ryan Villopoto will start the World Championship Motocross 2015. On the occasion of the exhibition in Cologne, staff Kawasaki used the launch of its highly publicised Ninja H2 to announce to the press the arrival of multiple champion AMA Motocross and Supercross in the Monster Kawasaki KRT next season. A big challenge for Ryan Villopoto is the first great American champion next challenge! This should give more spice to the World MXGP, it is looking forward to the showdown with multiple world champion Antonio Cairoli or with the official Honda HRC Gautier Paulin future.”