[Sentai]

I'd have quoted that but one novel is enough ()

I agree with almost everything you said there, Eric. But only with a few minor tweaks to some of the general ideas.

-Warstar into Zangyack - I posted earlier in one of these threads that Zangyack could be the bosses of the Warstar. The Warstar would be kind of an advanced fleet. Similar to how Goku as a bay was sent to take over Earth? They sent an advanced force thinking that'd be enough to handle one pitiful world.
-Gosei Knight into Gokai Silver - Part of me holds out hope that Gosie Knight is destroyed somehow (), and is replaced by a whole new person. JDF. Come on Jason, I believe in you!
Suits - I do like the idea of keeping the Gosei suits throughout the whole series. And then introducing the Gokai Silver like they did Kibaranger.
Gosei Knight - I know what I said above. But if he kicks as much ass as he did in Goseiger than please have him stay the whole season!

But you're right. Saban painted themselves into a corner, and now have to blow their brains out over the logistics. But that idea about having the Pre-Zyu rangers being rangers from other planets/time-periods/countries? The Series-Finale of Masked Rider says Hi. Look how wonderful that worked.