MegaBloks says that the 20th Anniversary MMPR set was a hit, so they want to make another for 2014, they gave the options at Facebook for RPM, SPD, Mystic Force and Jungle Fury.
RPM and SPD were almost tied so we will see what turns up.
I am personally hoping the RPM set has all seven (Red to Silver). If they make a SPD set I bet you it would just be the main 6 but it would be awesome if they made 8 (Including Shadow Ranger and Kat Ranger). It could be possible if they make 2 sets and each one 7.