Board Thread:Wiki Discussion/@comment-27373096-20181101105900/@comment-1660749-20181102191212

Deltarune is an "another Undertale", "Undertale 2", that's how the game is being perceived by the people. Rarely anybody will play Deltarune blindly unaware of the existence of Undertale. If I would want to know more about Sans in Deltarune, I would go to an Undertale Wiki and not look for an alternative regardless.

The Deltarune FAQ simply says that "it's a different world", a different, alternate universe. I think you are mixing this with "series".

Sonic 2006 is a reboot of the Sonic story, but it's the same series. Archie's Sonic is a comic series and a completely alternate universe from the games. Same with Sonic Underground or Sonic Boom - it's still the same "series", it's about Sonic the Hedgehog.

This premise is equal to locking Venom movie from a Venom Wiki because that's a different take on the same universe. It's equal to removing Luigi's Mansion from Mario wiki because that's a spinoff. It's equal to removing FFPS from FNaF Wiki because it's no longer called "FNaF" in the title.

Deltarune is not unrelated to Undertale. If Toby created a new IP, for the better visualisation let's say Kirby - if he created Kirby now, then obviously it's unrelated to the Undertale and there is no point of placing Kirby on an Undertale Wiki.

But Deltarune is an alternate take on Undertale. These are the same characters in a different setting, in a different world. The title alone refers to Undertale. As an "alternate timeline/alternate universe", it is still a part of the series. We still have monsters and humans, apparently Chara, we still have Sans and Papyrus and the rest of the cast.

Deltarune's timeline may be related to Undertale - we know that Toby has already been messing with "alternate realities" around Gaster and his followers, we also know that he's been planning Deltarune since 2012 - but it doesn't matter, these are just theories. But either way, it's still the same series.