After watching the 5th film, I was hoping so hard that Sirius would somehow (almost by magic! ) return. That'd totally screw them over for unnecessarily changing the spell to an Avada Kedavra. And this point highlights why I hate these movies: pointless changes. They cut out things that should be in, change things that don't need changing or simply shouldn't be changed due to the plot importance, and often just add pointless things for the hell of it. I've got £20 saying Hermione gets a nude scene in the last film*.

*This totally needs to happen actually.