Per this Twitter post.
No indication of whether this is going to be a true post-Season 2 sequel or just a recap movie.
Edit: Anime News Network says that it's going to be a sequel.
Edit 2: A mod replied with Japanese sources that confirm the movie will be a sequel. Thanks, Basenji!
Is it just recap movie or sequel? Seems like recap to me
ANN says it's sequel https://www.animenewsnetwork.com/news/2026-01-17/medalist-anime-gets-film-in-2027/.233172
The actual announcement was vague and unclear about whether or not it's a sequel, but I see at the bottom of that ANN page that it says, "Disclosure: Kadokawa World Entertainment (KWE), a wholly owned subsidiary of Kadokawa Corporation, is the majority owner of Anime News Network, LLC."
So, it's possible that ANN has access to authoritative insider information about the movie being a sequel.
https://natalie.mu/comic/news/656525
https://www.oricon.co.jp/news/2431175/full/#
Natalie and Oricon are pretty reputable, and specify that it will follow on from the 2nd season
劇場版ではTVアニメ第2期のその後のストーリーが描かれる。
I'm not a fan of movie-format sequels to TV series that are still airing, because they arrive many months later. Sometimes it can take up to a whole year to see them on this side of the world. If it's not popular, I don't even dream of it being in theaters. Sometimes they aren’t even available on streaming. Too bad.
An ice skating movie of the perfect story? This might fill the hole that was left in me when Yuuri!!! on ICE The Movie: ICE ADOLESCENCE was cancelled.