I've seen this before. This is how it should've been since Saban wanted to hold on to the 'Dino Bucklers'. My idea was that since Tommy couldn't be included in the clip since his counterpart was female, that Aisha becomes the white ranger.
Kimberly (Amy Jo Johnson) was going to leave the show anyway. Then Kat becomes a ranger in Zeo like Tanya.
Tommy/Red Ninja Ranger
Aisha/White Ninja Ranger
Billy/Blue Ninja Ranger
Rocky/Yellow Ninja Ranger
Adam/Black Ninja Ranger
Yes, I was watching the Kakuranger opening while I was typing this up.