My sister is looking for a movie she once saw. Some of these details might be inaccurate, but what she remembers is that there were three kid characters, two boys and one girl. All ended up as adults at the end of the movie? Forced to work in mines for a giant leader villain person. Lots of lights and a big battle at the end? And lots of kids got turned into statues.
It would’ve been from 2017 or earlier, and she said it was 3D but doesn’t remember.
"The Chronicles of Narnia: The Lion, the Witch and the Wardrobe" (2005)
You can read a detailed plot summary on Wikipedia here.
Quotes from the above Wikipedia plot that support elements in your question:
The children and beavers escape, and Jadis turns Tumnus to stone.
Both armies clash, with Jadis' army nearly overwhelming Peter and Edmund's.
Fifteen years later, the siblings, now adults, pursue a white stag.
There not three, but four siblings, two boys and two girls, but your sister probably misremembered that part (you also state in your question that some details might be inaccurate). The White Witch turns some characters into stone. There is a massive battle at the end of the movie. The kids grow into adults at the end of the movie. It is not a fully animated movie, but a lot of CGI was used, so there is a lot of CGI animation in the movie. The movie is from 2005, so the year also fits your timeline.
