So the fandom seems pretty split on what type Sylveon is going to be. Flying, Bug, Dragon, and a new type are the main contenders.
What I want to discuss is something very specific.
Basically, I think that Sylveon is going to be the first new Fairy type.
This thread isn't for speculation on what type Sylveon will be. It's for discussing what the mechanics of a Fairy type would be, should it be made. You're welcome to speculate even if you don't think that GameFreak would make a Fairy type, of course, but let's try to keep the thread on topic.