I feel like these will make their way into the main show eventually.

After all these bottles are a part of the total bottles for the 60 right? I could honestly see them using them especially since these aren't special forms like The Rider Damashii/Legend Rider Game Forms/Namco Gamers.

Based off the wiki these are SameBike, KirinCyclone, WhaleJet, ToraUfo, and SmaphoWolf Hazard. With the matches for Kirin, Whale, and Tora all supposedly from Seito.

On a side note, since Sento says the Dragon was the only bottle from Touto that could react with the Sclash Driver, and I assume the same situation happened with the Robot Bottle from Hokuto.

Which of the Seito Bottles do you think will be used for the Seito Rider?

it's not seen as clearly as the others, but RoseCopter is also seen in that trailer

Full Bottle seen at the start of the trailer are :

Sai : Grey
Dryer : Red
Obake : Light gray
Magnet : Dark Blue
Penguin : Black
Skater : Grass Green
Kirin : Yellow

Spider : Purple
Cooler : Light blue-ish gray/white
Turtle : Green (or, well, TURquoise)
Watch : Grey/Black

DogMic, BearTV and BettleCamera we've seen form already.

EDIT :

Panels have more :

Blue Panel (Hokuto) : https://i.imgur.com/N5LWk8M.jpg

PhoenixRobo
RoseCopter
SmaphoWolf
UniRaser
TurtleWatch


Red Panel (Seito) : https://i.imgur.com/RacjDvs.jpg

ToraUFO
KirinCyclone
KujiraJet
ShikaMid
SaiDryer

Crocodile makes the most sense

About Crocodile, I think the Remocon Full Bottle is still unknown. But in toyline perspective, I think we can use Gear Rimocon (from Nebula Steam Gun) with Crack Crocodile Full Bottle to access Build CrocodiCon Form transformation sounds.

Same things with Bat Full Bottle, we can use Gear Engine with Bat Full Bottle to access Build BatEngine Form transformation sounds.

So then, we have all the FullBottles.

Touto:

1-2. Rabbit and Tank (RabbitTank)
3-4. Gorilla and Diamond (GorillaMond)
5-6. Taka and Gattling (HawkGatling)
7-8. Ninja and Comic (NininComic)
9-10. Panda and Rocket (RocketPanda)
11-12. Harinezumi and Shoubosha (FireHedgehog)
13-14. Lion and Soujiki (LionCleaner)
15-16. Dragon and Lock (KeyDragon)
17-18. Kaizoku and Densha (KaizokuRessha)
19-20. Octopus and Light (OctopusLight)

Hokuto:
21-22. Phoenix and Robot (PhoenixRobo)
23-24. Wolf and Smapho (SmaphoWolf)
25-26. Kuma and TV (KumaTV)
27-28. Rose and Helicopter (RoseCopter)
29-30. Unicorn and Eraser (UniRaser)
31-32. Spider and Reizoku (SpiderCooler)
33-34. Turtle and Watch (TurtleWatch)
35-36. Dog and Mic (DogMic)
37-38. Kabutomushi and Camera (BeetleCamera)
39-40. Scorpion and Gold (GoldScorpion)

Seito:
41-42: Tora and UFO (ToraUFO)
43-44: Kujira and Jet (KujiraJet)
45-46: Kirin and Senpuuki (KirinCyclone)
47-48: Obake and Magnet (MagGhost)
49-50: Sai and Dryer (SaiDryer)
51-52: Penguin and Skabo (PenguinSkater)
53-54: Shika and Pyramid (ShikaMid)
55-56: Hachi and Sensuikan (HachiMarine)
57-58: Same and Bike (SameBike)

Which just leaves Kyoryu and F1 from the hacks to be 59-60: F1Zaurus - and they might just be off-screen during the trailer. FYI, all of the above are seen in the trailer (well, actually, Sensuikan isn't - but Hachi is, H/S and all on it's top, so I imagine Sensuikan is just hidden from view).

So yeah. BatEngine and CrocodiCon are likely just Bat + Gear Engine and Crocodile Crack + Gear RemoCon, as the sixty FullBottles are listed above.

Kamen Rider Build DogMic Form in Ganbarizing Game:

https://www.youtube.com/watch?v=pqMvQSRSXt0

I think the Yellow one that you think is Hachi is in fact Kirin. The label look the same as Kirin on the panel.

No, it’s definitely Hachi. There is a VERY clear pic on the wiki showing it is definitely a ‘H’
For reference, compare it to the 'K' on Kaizoku or Densha.

New 4-part Home Video special series starring Gentoku Himuro AKA Night Rogue

https://www.youtube.com/watch?v=WlGsVXoQfSE