Dude your dreaming if you think that will ever happen

We should at least get the concept art for all of them.

to be fair, holy live was MEANT to be the final form, and kagero was meant to be dead for good. but the audience liked Kagero way too much so they brought him back and gave him and daiichi a new final form

So next episode debuts a new villain.
I think it may be Fuga given how he just vanished and that the two look similar.

I'm thinking it might be a Geryon fused with the entity behind the Door of Darkness given his chest has the same three orbs as the monster's eyes and the upper armor appears to be over a Malgam body. Especially when said entity came out of the Door of Darkness this last episode and his name according to summaries is Dark King Gigist

Does the entity have properties similar to those of Chemies?

Official photos of Nijigon's "Rainbow category" cards from the Ride Chemy Trading Card: Phase 04 page.
https://www.rider-card.com/images/ca...rd/RT4-023.png
https://i.imgur.com/0MZUHkw.jpg
https://www.rider-card.com/images/ca...rd/RT4-024.png
https://i.imgur.com/KbYMtJW.jpg
https://www.rider-card.com/images/ca...rd/RT4-025.png
https://i.imgur.com/DmAUaT4.jpg

The EX label is usually reserved for film/side content-exclusive items, so could this indicate that Nijigon will appear in Gotchard's summer film and grant him a film-exclusive form or extra final form? The leak several months ago also showed it with EX label. Not sure about the egg card with ??? name. It could be a card for his default, embryonic form before hatching and splitting into the other 2 cards. The egg motif is also present in the Alchemys Union's logo. The artwork of the cards may also contain hints of the kanji 王/ou (king). These cards have the new NR (Nijigon Rare) rarity label. I wonder if they also have the C/Common version.

its just the base final form
 

nijigon is cool

The EX label is usually reserved for film/side content-exclusive items, so could this indicate that Nijigon will appear in Gotchard's summer film and grant him a film-exclusive form or extra final form?

Perhaps its egg form will have a unique interaction with the Exgotchalibur