The more I think about this, the more nervous I get. So many of these revivals end up canceled on a cliffhanger and don't get any real resolution or just quietly go away (see: Veronica Mars, also on Hulu). I don't want to see a Buffy go out like that, especially since we already have such perfect resolution from the original series. And at the end of the day, Hulu will treat it like any other show - with Sarah returning and an Oscar-winning director, it won't come cheap, so if it doesn't perform, they'll cancel it like they would anything else. It's special to us, but it's just another set of numbers to any executive.
I'm also just anxious about how they'll choose to approach it. I do have faith that they're going to try their best to get it right, but every idea that pops up just feels... less than thrilling to me.