Hang on a second. Listening closer to that preview clip, these seem to be partial redubs of the movies rather than simply the original dubbed versions. Tai's voice is Joshua Seth, Gabumon is Kirk Thornton, and Kai (Takato's cousin) is Brian Donovan, when all three were recast for the original English dubbed versions from back in the 2000s, wherein Tai was instead voiced by Jason Spisak, Gabumon was voiced by Jeff Nimoy, and Kai was voiced by Yuri Lowenthal (Brian Donavan had originally voiced Kai back when he appeared in the series itself as a guest character, which was years before the Tamers movies got dubbed with Yuri Lowenthal replaced Brian Donavan as the voice of Kai).
I say "partial redubs" because everyone else in this clip besides those three characters sound exactly the same and unchanged from the original English dubbed versions of these movies.
This makes me wonder if they're fully replacing the original English dubs of these movies that featured Spisak as Tai, Nimoy as Gabumon, and Lowenthal as Kai with the partial redubs, or if the set may contain two English dub audio track options for these three movies.
Additional recasts in these movies were:
- Patamon voiced by Bridgette Hoffman instead of Laura Summer
- Hawkmon voiced by Jeff Nimoy instead of Neil Kaplan (granted, Hawkmon only had one line in that movie, but still)
- Jeri voiced by Philece Sampler instead of Bridgette Hoffman
- Lopmon voiced by Mary Elizabeth McGlynn instead of Michelle Ruff
- MarineAngemon voiced by Mona Marshall instead of Wendee Lee
- Riley (the redhead member of HYPNOS) voiced by Philece Sampler instead of Tifanie Christun.
I can imagine Discotek getting back all of these original VAs if they really wanted to, minus Tifanie Christun who's retired and did not return to voice either Biyomon or Yolei in the redubs of the first movie set.