The gryphon mecha could be a one mecha robot.

How about this for a crossover:
Lupinranger Vs. Boukenger Vs. Patranger Vs. Dekaranger

Due to the Patranger's track record against the Lupinrangers, the Dekarangers are called in to handle them, and the Patrangers are only to battle the Ganglers, not being allowed to engage or pursue the Lupins.
Meanwhile, the appearance of a powerful new treasure prompts the Boukengers to reappear, thinking it's a Precious, while the Lupinrangers believe it to be part of the Lupin Collection.
While the Boukengers would be willing to work with both police forces, they come at a crossroads as they believe they can't properly contain and protect the treasure.

So now we have the Patrangers, frustrated that they believe they're being treated as inferior, butting heads with the Dekarangers, while the Boukengers are racing to get the treasure first, with the Lupinrangers trying to get all 3 teams off their backs and get the treasure before the Ganglers make proper use of it.

Hmm this would be a nice youtube series than a movie just so it does not get forcefully crammed into a feature film.
Personally I wanna see a cars-only special where Red Turbo/Riki is Kurt Russell and a team composed of rangers with car motifs or vehicles so that includes people like Bouken Black, Gokai Green, Red Buster to name a few and just have a Fast and Furious style adventure.

Shout Factory is releasing JETMAN.
https://www.youtube.com/watch?v=AzmhREXZRCM

I'd like to see a Gaoranger/Gingaman-esque sentai.

So where did the rumor of Carranger plan to be the last Sentai rumor came from? I did my best to track it down, but it seem like the fan subbers of Super Sentai during the tape trading days may have heard a rumor in Japan about Ohranger doing poorly with rating and people started rumors of the next Super Sentai being the last.

Or maybe the rumor was created by the Power Rangers fandom because how badly Turbo did and assume the reverse happen in Japan. I'm still digging to see where it came from like on alt.tv.sentai and and rec.arts.anime. They have the oldest discussions of Toku and other nerdy Japanese stuff you can find on the web.

I don't think anyone really knows where it came from, but I'm almost certain it's a Western rumor.

http://tokusatsunetwork.com/2016/06/...r-save-sentai/

We talked to Red Racer's actor a few years ago about it and he'd never even heard the rumor.

Would make sense a medieval sentai with animals mechas like Gingaman/Gaoranger ?

Gokai Change, Shinken Red Edition: Shinken Red, Super Shinken Red, Hyper Shinken Red, Gedou Shinken Red, Princess Shinken Red, and...Uhh...Shogun Mode from Super Samurai :lol

I think that'd be fun to see if the Gokaigers came back again. ALL OF 'EM SHINKEN RED.

Anyway, here's a question. How do you prefer your monster designs? Silly but unique, or safe but "Cool?"

I'd take silly but unique. More out-there, memorable designs are my jam than something that could be from any sentai imaginable.