I think if it proves popular (if they see a boost in year over year attendance versus 2013) then you will see it continue. It's not uncommon for Disney to come up with things like this and call them short term and then extend them. Remember when MSEP was just coming for one summer about three years ago?
It's also possible some portion of the events may continue. For instance, they may decide not to extend the fireworks and the dance party, but extend the rest.