It's possible. If the show and toys are popular. I'd be somewhat surprised to find reoccurring show characters like the constructicons didn't have any early toy design work done. If those could be up and running within a year, brand new stuff could be only a few months behind. In between theres the stuff still unreleased by Hasbro and a fair number of possible repaints hasbro didnt do. Starscream alone could be repainted an extra 4 times and with a bit of modding again for Slipstream.
Prowl can get the traditional set of repaints too. Theres probably quite a bit of F1 homage potential generally which the Japanese seeme to like.