Undertale: Beyond the Void

Undertale: Beyond the Void is a 2032 fantasy adventure film based on the 2015 game of the same name by Toby Fox. Directed by Nia DaCosta and co-written by DaCosta, Rafe Judkins, Derek Connolly, and Rick Jaffa and Amanda Silver, this tells the tale of Frisk, Leon, Asriel, and Monster Kid travelling back in time to when the Great Monster War was at it's peak, finding out who sent them here, and trying to get back home. It stars Mckenna Grace, Finn Wolfhard, Willem Dafoe, Lucy Boynton, and Christoph Waltz as their live action roles, while Aidan Gallagher, Bill Skarsgard, Keanu Reeves, Stephanie Beatriz, and Josh Brolin play their live action roles.

A third film was planned by producer Allon Reich and would be a more traditional fantasy film.

Plot
Dr. Alphys, who