Although I wish Takari becomes canon, I haven't many expectations about this. I should mention that interview wasn't with seiyuus of Takeru and Hikari, but with the director of Tri (Keitaro Motonaga).
Another thing, I read on this topic the rumor that Jeff Nimoy hates Daisuke and he made Daisuke dumbest in the dub because of this, but I must say that this is a fake rumor. Jeff Nimoy said in an interview that Davis is one his favorite characters:
CMcF: So what was it like for you to be able to return to the Digimon universe, and specifically, to these characters? I'm sure that most viewers of the movie felt the bite of the nostalgia bug to see - and perhaps even more specifically for viewers who had already seen the original Japanese version, HEAR - Davis and co. in a new adventure, but how was it for you? I don't imagine you ever felt you'd be working with these characters again.
JN: No, I thought my Digimon days were over for sure. It was great writing for the characters again, especially Davis, Izzy, and Joe, who are some of my favorites. Other characters didn't really have much to say or do in this movie, so I couldn't do much with them. But mostly, I was happy to see the actors one more time. Paul St. Peter, Michael Reisz, Mona Marshall, etc. People I hadn't had the chance to work with or see for quite some time. Directing Mona playing Izzy is an absolute pleasure. She defined the character so well, it was so easy to write the dialogue. Same with all the other actors, like Philece Sampler, Michael Lindsay, Lara Jill Miller, etc. I've directed a lot of these actors in other projects since, but it was special to hear them recording these roles again. Every time an actor came in, we would just shake our heads and say, "Can you believe it, we're doing Digimon again?" None of us thought we'd ever be doing it again, I'm sure. There was a lot of laughing, a lot of memories, and a lot of story telling during these recording sessions, and we all had a great time. We had a lot of old Saban/Fox Kids people working on the show again too, which was nice. And even our Network Exec at Disney was an old Fox Kids person, Dan Evans, and he allowed us to set the tone for the feel good attitude we all enjoyed. I wish he was the Network Exec when the show was first on the air, it might still be going. The original Digimon was a stressful work atmosphere after Rita left, but this movie couldn't have been more enjoyable, thanks to Rita, Dan, my buddy and hero Executive Producer Jamie Simone, and everyone at Studiopolis.
http://digipedia.db-destiny.net/cast_crew/nimoy2.htm