Is Undertale Sans from Deltarune's World?

Is Sans from Undertale the same Sans as in Deltarune? This Deltarune theory has been floating around since 2018, and today I discuss its evidence, its holes

DELTARUNE Chapter 2 SANS Secret Cutscene

Is Undertale Sans from Deltarune's World?

Spookydood on X: Will Sans and Papyrus be important in Deltarune? Will they be main characters? Will we get a deep dive into their backstory (yes obviously)?? Will they have a Dark

Stream DELTARUNE - REVOLVANIA (THE WORLD REVOLVING x Megalovania Remix) by RetroSpecter

Is Sans and Papyrus really from Deltarune? A Deltarune/Undertale timeline theory.

Is Undertale Sans from Deltarune's World?

Stream [Undertale/Deltarune AU] [An Undyne THE WORLD REVOLVING] A Whirlpool Of Willpower by Moonstriker Expansion Pack +

Spamality - Metal Designs by Draculabyte – draculabyte

Deltarune Kris/Undertale Frisk Meets Sans by GiddyDog on DeviantArt

* Still got that sweater. — SANS IS FROM. DELTARUNE

How Are Deltarune and Undertale Connected?