I'd be okay with Delta not appearing if the explanation is that nobody remembered to keep in touch with Mihara.

Forget Mihara! He was a bad choice. Didn't stand up to Kusaka for Takumi and Orphnochs! And a poor fighter.

Rather someone else. Let's hope Delta gets an upgrade too.

A blue body with white Photon Streams? Muse is basically the opposite of Psyga. Not just the colors either. 3+1+5=9, which is upside down 6, as in Mu. Looks cool!

I love what we're getting new Orphnoch suits.

I like about 90% of the Muse's suit. But I'm sorry, those shoulder pads/armor gotta go. They look like someone stretched out Gatack's shoulders in photoshop and duct taped them on to her.

They did kill him off in the Paradise Lost prequel story in the Hobby Japan (the hobby magazine) short novel segment S.I.C. Hero Saga for Faiz iirc.

Looks like Kaixa's new phone is called the Kaixa phone XX, this also appears to be bundled with the home video release of the new film. Also a new poster for the film.

Edit: Here's the new trailer too guys-
https://www.youtube.com/watch?v=3oRD_8hyDD8

So if I'm understanding correctly SMART Brain is (for some reason) now hunting down Oprhnoch and Takumi is working with them despite being one himself and Mari is upset that he's turning his back on peace between humans and Orphnoch.

Also Kusaka (who is somehow alive) is preying on Mari while Takumi is away and Takumi has something going on with Muse. Classic Inoue romance drama.

Keitaro!!! Kaido!!!

Man, hearing Justifaiz again hits hard. Also seeing Takumi as the Wolf Orphnoch again.

Adding to what you said it appears to be for limited edition home video release copies only. And is that Ray Fujita I see? Also, looks like Mihara has a successor so too bad Harada won't be reprising the role based on what we are given for now. But then again, it could be that he gave it up and is elsewhere enjoying life.

I like how they changed the phones from flip phones to smartphones, gotta go with the times lol