Although the cynic in me wants to say "Oh dear, already? Did she blow all her money in Vegas or something?" I actually think the world she created is strong enough to support new works. Indeed, I'll go so far as to say it might actually flourish without labouring on this prolonged "chosen one must face the evil bloke with no nose" arc.
Not sure about the title though, but I suppose it's not like they can call it Harry Potter if he's not even in it.