The second movie in the Mortal Instraments movie series called City of Ashes has been delayed indefinitely. Constantin Film's Martin Moszkowicz states that after speaking with all of our partners on the creative and distribution side, it was clear that it will be beneficial to have more time to re-position the film in the current market place.
In layman's terms, people just aren't ready for it.
The mortal instruments crew looks to target the Twilight crowd, but the poor returns on the first movie shows they didn't quite capture them. I personally think it was the kind of gross love story that turned them off. I won't spoil it, but people who have seen it know exactly what I'm talking about.