tl;dr about canon: some elements may be grandfathered in from pre-season 4 stories, and therefore may not be 100% canon-compliant. This is because Slice has been going on long enough that it's hit a point where certain things may be too difficult to change, not because I have any issues with the show itself.
That aside, this comic is based purely on the show itself. Other elements might sneak in if I like them, but otherwise it's strictly show-canon. Something that shows up only in the comics/trading cards/toys/books does not necessarily apply here.
Anything that involves a spoiler will not be posted until at least 24 hours after the episode airs -- that's after it shows on the Hub, NOT after the spoiler leaks, even if it's something like Twilicorn -- so please be patient. Previous updates may be changed without announcement, again after 24 hours.