J.K. Rowling drives fans crazy with teaser tweets

What could it be!? What's she up to!?

Harry Potter fans are having fits, thanks to a tweet from author J.K. Rowling.

The screenplay is thought to be Fantastic Beasts and Where to Find Them, a Potter spinoff and trilogy.

But then she kept the buzz going, throwing out a few more cryptic tweets.

And,

And this:

Fans are hoping for more Harry Potter. Think there's a chance of that? At Moviepilot.com, one reader noted that tweets may be an anagram for:

"Harry returns! Won't say any details now. A week off. No comment"