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

Sans origin, DeltaRune/Undertale theory (spiolers), Lake Valor

Deltarune Kris/Undertale Frisk Meets Sans by GiddyDog on DeviantArt

What do you feel is the most interesting character in Undertale that's not a major character (The Dreemurr family, Undyne and Alphys, the Skeleton Bros., etc.)? - Quora

Sans, Deltarune Wiki

Puns won't get you very far in this world., Deltarune

Sans (Undertale) - Wikipedia

EVERYTHING EXPLAINED!! How Delta Rune IS Related To Undertale's Timeline

Deltarune dev announces major release date change for upcoming chapters - Dexerto

Sans, Deltarune Wiki

How Sans's lab could indicate a connection between him and the Deltarune world. I recommend checking out video Is Sans a Darkner? by Two Left Thumbs, which brought up many other pieces

10 Dark Moments In The Undertale Series

Killing him in the genocide run only freed him from his world. . . . #sans #sansundertale #undertale #deltarune #amongus #supersmashbros…