Toby Fox has published a new newsletter with a fresh update on Deltarune's development, revealing details about Chapter 6 now that Chapter 5 has launched. He expects Chapter 6 to be released as a standalone chapter sometime in 2027, and says it will be a shorter, more focused instalment concentrating on a single aspect of the story rather than the wider-ranging adventures seen so far.

Fox explained that many plot threads will remain untouched in Chapter 6, though one key element will finally be clarified, and he addressed concerns that shorter chapters might disappoint fans, insisting the pacing will make sense once Chapter 7 arrives. He also gave a progress report, noting he has finished writing several sequences for the chapter's final third and reorganised its structure, meaning a full rough draft should soon be playable from start to finish, with the boss fight and cutscene polishing still requiring further work. The newsletter also revisited Chapter 5 with extra concept art and touched on fan theories.