From Yufie in our WtW Discord:
This is what I managed to perceive after watching the movie (I couldn't understand 100%, felt like a fake N2)
- Preview screening starts with voice actors talk show. Veemon showed to take picture (I posted in r/digimon)
- No armor form or new jogress form
- There is a reason why Lui hides his right eye
- Like the other guy said, the jogress form purely serves as a fan service, in fact, paildramon appeared like 10 minutes into the movie (Daisuke were trying to get Lui to reach that floating egg, I thought it will stop with Ex-Veemon evolution but nooo they went straight to Stingmon > Jogress scene).
- OG Adventure kids only show as cameos on TV screen, acting as representative of the Digidestined discussing the whole "digitama-on-top-of-tokyo-tower"
- The scene in trailer showing young Taichi and Hikari walking away carries no weight. Daisuke, Ken, and Lui were transported to the past when they "touched" the Digitama. The day before Lui met Ukkomon."
- Lui living in Hikarigaoka carries no importance at all. I thought they are going to rectonned it with the first movie.
- Lui lived on an abusive household. His dad was bedridden and his mom, unable to carry the burden well, took it out on Lui.
- Ukkomon is a digimon that could grant any wish. Ukkomon made Lui's dad healthy again, made Lui became friends with people in school. Protected him. In fact, they retconned this by saying all Digidestined appeared because Lui "wished for a friend that would protect him"
When Lui said he "killed Ukkomon", what he did was smashing his own digivice with a bat after finding out what was happening, and some thing happened, and Ukkomon dissolved into nothingness.
- Some scene on Diaboromon Strike back movie as TV screen.
- Lui being born on 29 February carries some significant weight: it was the day he met Ukkomon. ANd then after the whole backstory was told, the clock strikes 12am on 29 February 2021 (I didn't check if it was a leap year or not), and Digitama on top of Tokyo Tower hatched into some grotesque calamari thingy with a lot of Digitama seed in the making.
- In movie time (2021), it is said that there are around 60,000 Digidestined around the world. Ukkomon seemed to want to accelerate this process by incubating Digitama for the whole 7 billion people in the world.
- They wanted to launch an attack on that Calamari Ukkomon, but Takeru warned that if Ukkomon was the reason for the existence of all Digidestined, defeating them would also mean Digidestined losing connections with their partner digimon.
- Lui seemed being the key to stop Ukkomon
- The final and only battle in the movie took place. Imperialdramon transported Lui to "touch" Ukkomon again, transported to past, seemed to change the past and made it so that young Lui never meet Ukkomon
- Adult Lui and Ukkomon talked things out and appear to reach an understanding
- After Lui returned to the present, they proceeded to attack Ukkomon to take it down.
- After it ends, every Digidestined in the world lost their digivices, but their partners are still around. Might hint that evolution is not possible anymore.
- A lot of cameo from International Digidestined from 02 series, including Wallace with his Terriermon and Lopmon
- Movie ends there. No retcon at all to epilogue.
- The thing that made Lui snapped and confronted Ukkomon was watching Omegamon fought Armageddomon in TV, realized other Digidestined he has not even befriended had to fight for his sake because of his wish "having a friend that would protect him"