About four years ago, a buffy animated series was set to go into pre-production with several cast members reprising their roles. I thought no footage was ever produced, but it looks like I was wrong. A 3:35 long clip was produced, a teaser you could say. It was posted on YouTube a couple days ago, but it looks like it may have been taken down.
However, I just found it a few miniutes ago at aintitcool.com. It's still there. Buffy fights a vampire, jumps really high, tears open her backpack to get a stake, holds open a giant dragons mouth while it's trying to eat her. Check it out before it's gone from www.aintitcool.com.