So someone just posted this, it's new toy catalogue info. Apparently, they were only allowed to see the ranger keys releasing, but it does confirm that other colors will be released in DX versions! However, it also shows that the Red keys are the selling point here, as other ranger sets are marked "EX". But that's to be expected hehe.
MARCH:
Ranger Key Set 02:
Tyrannoranger, DenjiRed, HurricaneRed, BoukenRed, AbaRed
APRIL:
Ranger Key Set EX- GokaiBlue Collection 01:
MagiBlue, HurricaneBlue, GekiBlue, VulShark, Triceraranger
Ranger Key Set Ex- GokaiYellow Collection 01:
BoukenYellow, GaoYellow, DekaYellow, DenjiYellow, VulPanther
MAY:
Ranger Key Set EX- GoukaiGreen Collection 01:
Mammothranger, BlackCondor, DekaGreen, ShinkenGreen, Go-OnGreen
Ranger Key Set EX- GoukaiPink Collection 01:
DenjiPink, Pteraranger, MagiPink, GaoWhite, ShinkenPink
JUNE:
Ranger Key Set 03:
BattleJapan, RedHawk, Ryuuranger, MegaRed, TimeRed
More info as it comes
Someone needs to start making a list (I've seen a wiki in Japanese hehe). It's likely that GoseiRed and Akaranger from the magazine are meant to be for the DX collection. This also explains why it's ShinkenBlue, and not ShinkenRed in the magazine. (comes with set 1).