I'm actually kind of worried they'll do that with all the heavy leaning on Ned learning the other Peter's best friends tried to kill him considering his namesake in the comics. >_>
For those unaware, Ned Leeds in the comics was (kind of) the original Hobgoblin. With the insinuation of magic with this Ned, I could see them rolling the original Ned Leeds in with the 2nd Hobgoblin character who eventually solicited a demon to gain magical power and became possessed. He ultimately freed himself from the demon which then became Demogoblin.
On second thought, it might be fun to have Demogoblin in a movie. Could even finally pull out Ghost Rider at that point if they wanted to.XD