Harry Potter and the Lost Time

Abandoned: Harry J. Potter, was stolen from his time and family the night of Halloween, 1961. Avada Kedavra brought him forward in time, and now it will bring him back. Harry is James' twin brother. Set in James' seventh year, what will Harry do when reunited with his true family? And what will he do to keep them with Voldemort still alive? No time paradox (T for possible language)