There will be a halftime show, and it will be in the same vein as the last several, because they're trying to hook a non-football audience into watching the game (it's all about the ad $$$).
If they decide the weather conditions will prevent it from being on the field, it will be staged in a nearby facility (there's a basketball/hockey arena in the same complex, right?) and displayed on the "Jumbotron" screens at the stadium.
If they go with what you have said, becuause if my memory serves me correct, there is an arena near by which is part of the Meadowlands, they could have something there. But the article just does not mentioned that.
If that happens, they will more likely invite either Billy Joel or the Boss again, because they are native NY/NJ guys.