What for sure will shown in anime:
- Nemona, Penny and Arven treat same like as XY trio gang (Tierno, Trevor, Shauna)
- AI Sada & AI Turo decide stay with Arven as his new parent after Area Zero arc
- Great Tusk and Iron Treads will together terrorize on desert
- Treasure Hunt will be treated short arc and will treated as a sport tournament (Prize is Herba Mystical)
- Koraidon & Miraidon not gonna join to MCs suddenly just like in game, but instead they gonna help them
fight against Titans sometimes
- Ash probably (for 1% chance) will meet two new MCs
- More different species of pokeball gonna shown again (Masterball will return to this anime after very long break)
- MCs will meet some old Ash's companions.
- Shiny pokemon will return again (see at Rayquaza, except him there will some other for sure).
- Both new MCs will have max 6 pokemon in team too.
- In Mysterious pokeball will be an unusual pokemon, but not LEGENDARY.
Probably will be one of ancient Paradox Pokemon. If he's from Kanto - must be Sandy Shocks.
- All old gimmicks gonna shown again but not all forms will be shown.
- All 18 Tera type forms will debuted (only one thing might be used by CGI technology)
- Breaking curse main girl getting only 1 or 3 mons.
- Some pokemon abilities debut again.
- First time all E4 trainers after long break since DP series.
- Iono & Larry teamwork for doing something funny
- Director Clavell pretending being as student named Clive.
- First time ever not edgy/jerk rival.
What for sure will NOT shown in gen 9 anime:
- Pikachu and Eevee being as new characters' partners
- All Paldean mons debut due to "Journeys issues"
- Focusing on whole Paldea region
- All Gym Leaders debut (probably)
- War with Team Star
- Any shipping (That obviously....)
- Focusing on school (due to traveling over 9 regions)
- Mass outbreaks
- Showing Koraidon and Miraidon at all times
- All Team Star bosses debut
- PWC/Master Eight Tournament
- All Regional Champions