I agree. There are so many possiblities that it boggles the mind. For example, Fred and George and all their joke inventions could set a trap for anyone includeing Voldemort. They have yet to invent something for Harry that will give him an extra advantage. Maybe Hedwig is an animagus sent to watch Harry's back. Maybe Sirius does have a child out there that was born at the same time as Harry yet to be discovered. Maybe Gilderoy Lockhart will recover some of his memory and forge to be a coward. Maybe the house elves will rise up and destroy all the Death Eater masters. Maybe the shrunken heads will get together and form a reggae band called, The Dreadlocks.

The possibilities are endless.