Will Wormtail appears in book 7?

Absolutely. That plotline was never resolved. Remember how Dumbledore said Wormtail owed Harry his life, and that he was in debt to Harry? I definitely see that coming into play in this book. It has been theorized by some people that he will kill Lupin with his silver hand, but JKR came right out and said that was not happening. But whatever it is that Wormtail does, I can't wait to read it!

Wormtail will eventually show up,, and I bet he will be killed!!

I think that Wormtail will certainly return, to pay back the debt of Harry saving his life. I don't think he will truly return to the good side. Wormtail is so weak that he will stay whereever he thinks he will be best protected, so even if he tries to return to the good, I don't think he can be trusted. I am so very eager to read the book. I don't know if Wormtail will have info about Harry's parents, but I am really looking forward to learning more about them, and I believe that we finally will. I don't know if there's enough room in the book for all of the closure that's ultimately possible, but I hope that she has it chock full of answers!

I think so.. if he is not appear than it will be sad... why? because he is also the one who make trouble.. so he must appear to clear all the thing that still blury ^^

It's a garentee that he'll show up in the last book no questions asked. Now, whether he'll survive or not is the real question.