not if it's written by jk rowling!
i just finished the book, and was disappointed with the epilogue, but very impressed with the writing of the book, it has been the best written. What ever happened to Luna? Rowling painted this image that the six of them had become good friends, and her story was the only on left unfinished. I also think a few books about the rest of the wizarding world would be interesting, kinda like how J.R.R. Tolkien did with his other books.
even though the story involving voldemort and harry is closed like JK wanted it to be, there's still room for other dark wizards and adventures...
holy shi'as! not bad not bad, you can now either sell it for extra online or keep it and treasure it forever(i would do the latter :])
i think that it would be pretty weird if there were to be manga and anime for the book. i enjoyed reading the deathly hollow so much that i kind of don't even want to see the 7th movie. it would be kind of disappointing if the movie doesn't meet my expectation. but it's just my personal opinion.