So JN39 is most likely going to be a Dynamax rematch between Ash vs Bea in Galar. Ash will use Pikachu or Dynamax another Pokémon and Bea will use Machamp if that correlates to recent merch. Ben made a great point about the opening frame where Ash enters enter a stadium #Anipoke

This could mean that the rematch will be held in Stow-on-side, the town where Sonia talks about the two heroes of Galar, Zacian and Zamazenta relating to the Darkest Day. 2 parter episode potentially loading here #Anipoke

Even if the rematch is a Dynamax battle, Ash will probably lose due to the lack of experience Pikachu has with the mechanic. The odds of him losing again are quite high #Anipoke

If it’s not a Dynamax battle then maybe it’ll be Pikachu vs Machamp and then Riolu vs Grapploct. Doubt Farfetch’d will be used as it needs more training and it’d be so forced if it evolved into Sirfetch’d having 0 battle experience prior to the match against Hawlucha #Anipoke

But yet again, Farfetch’d did take on Riolu and it would only seem right for the pair to get the ultimate revenge they need #Anipoke

As for Farfetch’d evolving, we have seen some of Ash’s Pokémon evolve with minimal to none experience, the best example being Krabby. But it depends how the evolution mechanic is gonna be shown in this series to game, e.g. Feebas evolved into Milotic without being traded #Anipoke