The episode titles and summaries for the next four weeks leaked early.
Summaries:
! > Episode 48- Mugendramon's Attack (May 16th)
Taichi and co. reach FAGA, only to encounter the vicious Ultimate level Mugendramon. It absorbs Piyomon, Palmon, and Gomamon's data, rendering them unable to battle. Meanwhile, Taichi receives a message from Leomon, who is far away traveling on ElDoradimon while housing the refugee Digimon: "Something odd is happening! Cloud Continent is falling!" It isn't long before even MetalGarurumon's data is absorbed and he is unable to fight. Mugendramon directs its powerful Mugen Cannon at the children and Digimon to give the final blow. Taichi and WarGreymon risk their own lives to protect everyone by charging at Mugendramon…Episode 49- The Evil God Descends, Millenniumon (May 23rd)
Yamato, Sora, and Koushiro try to stop Millenniumon from reviving, but Gryphomon attacks MetalGarurumon and it goes beyond their control. While Taichi's sister Hikari is stricken with despair, Mimi tries to console her. But even Mimi's grief at losing Taichi is huge.Episode 50- Finale: The Ultimate Holy War (May 30th)
Amidst Millenniumon's fury, Hikari and the other chosen children don't know whether Taichi and WarGreymon are dead or alive, but they choose to believe that they are still alive and fight. As the digital world is about to be surrounded in darkness, all Digimon send up their prayers for peace, awakening an evolution to Ultimate that no one had predicted.Episode 51- The Mystery Hidden in the Crests (June 6th)
The children overcome their final battle with Millenniumon, when they receive a message from Garbamon telling them that he found something that looks exactly like the crest that shows up on the Digivice at a place called "The Tree of Information." The children hurry there, where they reunite with Garbamon and meet Wisemon, who collects information on the digital world. There they find a secret room that's engraved with the eight crests, and learn of the even further duties that the chosen children bear.
My thoughts:
! It's pretty annoying that they're rushing into the fight with Millenniummon without giving most of the chosen children their mega forms one by one (it sounds like they're all getting them at once in episode 50 which is… what the hell were they thinking, seriously).
! I don't know how the rest of the series is going to play out, but there's no way Diablomon can handle fifteen episodes worth of plot development and Millenniummon should really be getting at least five or six additional episodes instead of just showing up randomly at FAGA and fighting the Digidestined because destiny.
I don't care how cool the fight looks, we needed to spend some time with Millenniummon the same way we did with Myotismon and Etamon and Devimon and Puppetmon in the original series to get to see him in action as a villain and learn a bit about his character.
If he just shows up and attacks mindlessly like 2020 Devimon did that's not a character, it's a miniboss from a 90s JRPG.