Interesting to note that that third hand can only be Akaranger or MegaRed as it has no cuff.

New poster and trailer. Marvelous and Kairi are back
https://www.youtube.com/watch?v=XREofkVP6TQ

Guess that answers who the Sempaigers are

nice

Marvelous be wanting words with Zox about stealing his look.

Kairi is one of my favorite Reds from the last decade, so it'll be cool to see him again and how his career as a phantom thief is working out.

But the coolest thing about that new poster and trailer is how Stacaesar is an important part of it!

Secret Power, Zenkaizer!
Dinosaur Power, Zenkai Juran!
Beast Power, Zenkai Gaon!
Magic Power, Zenkai Magine!
Rumbling Power, Zenkai Vroon!
Pirate Power, Twokaizer!
Darkness Power, Stacaesar!

Seven Assembled,
Kikai Sentai Zenkaiger!

Yeah, I'm seriously looking forward to that 7 member roll call. Too bad they couldn't include Hakaizer, but hey, I'll gladly accept this! :D

Regarding Sempaiger, it's the same guys who were hanging out with Don Momotarou in his merchandise. Now that Zenkaiger has made alternate worlds easily accessible for everybody, new opportunities have opened up for future crossovers and I'm thinking maybe this could be some kind of prequel to Donbrothers that will start to explain the connection between the two shows.

A pirate complaining about piracy would be pretty hypocritical though.

Also, if Marvelous' introduction is anything other than him eating all the snacks in Colorful, then I'm going to be a little disappointed.

I'm excited seeing the word "Gokaitopia" in the plot summary. I kinda hope they go ahead and somewhere give similar names to all the Sentai worlds.

wow cool.

New images

So Zenkaiser and Twokaiser get to use Go form. Interesting. We have seen a few crossover power-ups recently