1. Crimson Dragon, The Signer Dragons & Earthbound Immortals are the highest Divine Hierarchy(9 & 10), below them is the Gentle Darkness of creation, Light of Destruction, Neo-space, Chaos & Order/Shining/Zexal(7), then Divine Neos & Yubel(5), then comes the god cards beneath them.
2. Black Rose Dragon created the laws of reality and Ancient Fairy created life.
3. The positive & negative energy of the SD & EI & the Gentle Darkness of creation, Light of Destruction, Neo-space, Chaos & Order/Shining/Zexal predate everything else.
4. The 12 Dimensions in GX are: Earthly Realm (created by The Numeron Dragon), Shadow-realm (created by Zorc), Nightshroud's realm, DM spirit realm, Astral World, Barian World & others, but the Ocean of Worlds is the space between Astral & Earth, not a separate dimension. Netherworld & Heaven can be a part of the 12 or be outside them.
5. Nightshroud is Holactie's equal & the father of Zorc & the grandfather of Darknite/Nitemare & Manawyddan fab Llyr.
6. GX is 10 years after DM ended, 5D's is 20 years after GX, Zexal starts about 60 years after 5D's epilogue, Arc-V about 80 years after Zexal, Vrains about 30 years after that & Sevens about 70 years after that, it adds up to the roughly 248 years (epilogue is 8 years after the end of 5D's), so the approximately 200 number Z-one gave still stands! That way Yuma & the Zexal cast die of old age before Zarc loses it & explains why Yusei didn't help with the Barians. Yusaku dealt with everything faster than Yuya could be notified so that fits.
7. Yuma X Tori X Cathy X Anna X Lotus (can't waste a character with a rare power & is basically a Zexal version of Seika).
8. E'rah being someone Astral & Don Thousand banished from Astral World, before the split.
9. Dr. Faker Tenjo digitized himself before death, like Gozaburo Kaiba, & has been keeping his deal with Vector, as a computer & Android w/o Heartland knowing, thinking Faker is dead.
10. Don Thousand releases 108-999 to his soldiers.
11. Yuma creating an Infinity counterpart to Future King Hope, like History Queen Love.
12. Yuma's harem creating XX: Utopic Dark Infinity.
13. Shining/Zexal representing Order, consistence & Teamwork, as opposed to Chaos representing change.
14. Don Thousand having a base 1000.
15. More imaginary number cards, like Numeronius Numeronia.
16. Barians having Chaos equivalent to Zexal Weapons.
17. A shining chaos number, or Harmonic if you will, will appear.
18. Being based on both the Manga & Anime.
19. Lemons & Orgies.
20. Kite X Dextra.
21. Yuma becomes smarter as the story progress & sees through Vector's scheme & has Cathy keep an eye on him through her cats.
22. No Romance for the Emperors, because they'll stay in Astral-Barian after everything is resolved.
23. Dog will become a reoccurring character.