It really depends I suppose. Theoretically, with this much supposed planning in place, the ride should have been bought a long time ago. Otherwise, it's a wing it type situation.
Let's say the rumor is true and the ride isn't so much of a problem as install costs, parts costs, etc. If that is really the case, track should be showing up any week and simply being stored by Great Adventure on premise until they figure out what to do next. They're not going to pay storage fees for a year while its delayed.
Either way, I dont see another package coming before the next coaster. They would sooner skip a year of investments.