WMG / Future Card Buddyfight

The real identity of the disaster fighter in full armor is actually Tasuku Ryuenji, being brainwashed after being held prisoner.

Confirmed. They didn't even bother hiding it, since he has been shown unmasked on the cover art for the fifth booster pack and in the commercial for said pack. However, we don't know if he was brainwashed.

• Considering Jack was put in the arena, AND Tesuku shows all the emotion of a robot as the full armor guy, I think brainwash is a safe bet.
  • Tasuku's speech in Episode 53 shows quite clearly that he isn't brainwashed.

Zanya will lose to Rouga in the finals.

Since that Gao VS Tasuku match must goes on, someone has to lose somehow. As a corollary to above, Tetsuya will get revenge on Sofia for erasing memories of Terumi, something that he will learn in the match between them.

• Sofia lost and Gao vs Tasuku is confirmed to happen thanks to episodes preview, so this is pretty much a given.

Kyoya will use all of the important enemy buddy monsters in his fight against Gao.

From the card game, we know that Kyoya has a special flag he fights for, Dragon Ein, which will lety him use dragons from all worlds. What better way to cap off the season than with a hit parade? Gallows, Deathgaze Dragon, and Demios Sword Dragon are all under his command already, and he could use non-living versions of Deathtallica, and maybe even Jackknife, El Quixote, and Seiger, representing all of the challenges that Gao and co have faced and won. The extra life he will start with will give him a buffer to extend the game a bit, and the low number of cards in his hand means he'll have to keep Gao busy before he draws the cards he needs.

• He used Deathgaze and Thunder Knights Drum.

Kiri is an Omni Lord

The missing Omni-Lords might be humans who don't have memories of their past selves. When this as said, we got a shot of Kiri.

• The third Omni Lord does looks like Kiri, so it's possible. However, it could also be Kiri's Dungeon World counterpart.
• Confirmed. Kiri was an identity that Miseria created for himself so that he could live as a human.

Asmodai kept his role as Omni Lord a secret because he wanted to hide a misdeed

Why did Asmodai hide his identity from Tetsuya? Surely if he explained that he was an OL, this would lead Tetsuya to keep him away from Ikazuchi - and therefor, would probably mean that he'd be out of the action without him.

Dawn explains in the fourteenth episode of Hundred that the OL had a clan of humans watch over Yamigeddo's sealed prison. Mistaking them for gods or demons, the family became more strict in their believes and practices in order to appease and worship them. Obviously, this had a negative effect on them.

My thought is, maybe the Omni Lords have a dark past where they were bad people, or accidentally hurt a lot of people? This would explain why Asmodai is so secretive; he doesn't want Tetsuya to know and hate him. Or, if Tetsuya digs for information regarding the Omni-Lords, he could get hurt or even killed.

What Dawn has explained already the white-washed version, and enough to placate everyone without having them dig into their history too much.

• Jossed.

Variable Cord will return Jack while also making him the new sixth omni lord

It seems fitting for both Drum and Jack to become omni lord successors. The fact that Variable Cord no longer wants to be Omni Lord and that Jack had to go to Star Dragon World anyway to become able to survive on Earth suggest he will eventually recover and return as a new omni lord.

• Jossed. Variable Cord leaving created a timeline where Yamigedo won and Star Dragon World never came into existence, thus he and Jack never arrived at Star Dragon World. Also, Jack's new form, Jacknife Astrel, is not an omni lord.

Paruko has a twin brother who is Sibling Yin-Yang with her.

In Buddyfight Ace, we met her niece Ion Nanaha. Therefore, Paruko must have a brother, and considering Ion and Yuga look about the same age, her brother might me her twin. The reason we never see him is because he's Shrinking Violet compared to his Combat Commentator sister.