Nobody knew. Gokaiger's not exactly an ordinary show, not so easy to predict, and people were already expecting for them to address actors who played multiple characters. (It also made no sense to eliminate the possibility of Ogawa playing Sasuke after playing Hyuga since he's the best bet in terms of who they'd be able to get back from Kakuranger.)
And I'd still like for Jun'ichi Haruta to pop up to do more, and as Ryu Hoshikawa/Dyna Black! I don't think people should be overlooked for playing more than one character. (Makes more sense to let Ogawa play Sasuke than let Ohba play Gavan.
) You even said you'd forgive Hiroshi Miyauchi if he showed up playing Ao Ranger for a change.