First thing, there is not much land to clear for a JL:BFM ride. Why start now where demolition and site prep is minimal.
Now, if you look at Google Maps, there is plenty of land (not huge) behind the bumper cars and behind the old Viper station. Good space for a coaster.
If this will be a S&S coaster, it could go behind the bumper cars over the behind the train maintenance shed. Again, it won't take 8 months to build one of those. Think about Goliath construction. Started in mid summer with the Great Gasp closing. There were construction markings for the footers already mid summer.
If anyone is on the train of the Superman path, see if there are any signs of survey markings. This can get us some idea. If this will be a large coaster which I doubt, you will see tree removal potential and clearing going on by fall time.
Potential rides/coasters for the area:
JL:BFM - Would fit perfect in the spot. Metropolis City folks! Still wondering why start now.
S&S Freespin: Would fit and would be a clone of Great Adventure. Still wondering why start now. Narrow footprint.
RMC T-Rex: Only concept been scene. This would be a great addition if they can add a launch element to it.
RMC Wood: Could fit a RMC coaster like LR or Outlaw Run.
B&M: Long shop for a drop or floorless.
Mack Water Coaster: Room for this and can go over 60mph. Launch type as well.