Kasparov said before that he doesn't have the stamina to compete in classical time controls, but he can still make a mark in rapid and blitz.
Kasparov has never been one to underestimate himself. I expect he will pick and choose a few rapid events like St. Louis, but he won't be competing for the Grand Prize in the tour. Btw, Carlsen has it almost wrapped up after winning the first two.
Want to take that back?
Predictions here guys! Everyone is welcomed!
https://goo.gl/forms/1I3gBfctgdz3AFoh1