This is my approximate estimation on they land they didn't use for Orion:
If the park wanted to take this further, this is the land that they could reasonably use for a grade A expansion (something like that):
Just looking at the webcam you can tell that they didn't use all of the space occupied by Firehawk.
They could easily make a pathway under Orion to the space between the tree line and the brake run and add some new rides.
Just thought I would start this here. Seems to me since they didn't use all of the previous Firehawk space for Orion, I would imagine we could see Area 72 greatly expand into those areas in the near future.