The summer 2009 movie "Orphan" was a brilliant movie. Isabelle Fuhrman delivered a fantastic performance, and left the fans wanting more.

*Spoiler*
Since not only did you never see Esther actually die,
*/Spoiler*

but you didn't learn much about her past, there's a lot of room for a sequal or even a prequal. It's definitely got potential, but needs to be done soon before Isabelle gets too old, because Esther was stuck at the same height for most of her life... and because nobody else could deliver the proper Esther performance!