If you will allow me, I'm gonna sperg out for a few paragraphs. I have literally read no theories or anything, or played the Snowgrave route, (because Genocide totally forgets up your save in Undertale, so I'm saving it for later, probably when all 7 chapters are out) so If I'm categorically wrong about some things, let me know.
SPOILERS AHEAD, don't read this if you haven't finished Chapter 2.
- One of the Titans that Ralsei talked about looked suspiciously like Asgore's silhouette.
- If SOULless Kris wanted to kill everyone, he'd lock the SOUL up and just let the dark fountains consume the world, instead he seems to almost insist on keeping the SOUL around, and letting it control him and eventually seal the fountains.
- SOULless Kris never raised a hand towards Susie, or Toriel, despite having a knife and easy access to them. Either he doesn't care, or actually is attached to them.
- Dunno, but I'm like 80% sure that the only reason SOULless Kris slashed Toriel's tires was to make sure Susie and Toriel would stay at his house.
- There's plenty of hints that before the events of the game that SOULless Kris is a troubled child, but the things he did never seemed malicious. If Toby wanted to make it clear Kris was Chara-level evil without a SOUL, he would have, barring the chapter 1 end-scene, but I think that was purely to shock the player, after all, all he really did was eat Toriel's pie, (and this is probably a reach, but he may have only used the knife to cut the pie) Kris played pranks on the level of putting bath-bombs in toilets, spooking Noelle, and generally being a nuisance, but nothing truly sociopathic in nature.
- My big hypothesis: I don't think SOULless Kris is the true antagonist, I think something worse is coming. Could be Gaster, could be something else. Because I kinda doubt it's Asriel, given how the townsfolk speak so highly of him.