I think if along with the Rip Rocket Ride replacement they're already doing, they're able to do a F&F replacement that's at least moderately well received, this park will have enough going for it to last until they're ready to address the Simpsons' area. The Fear Factor stage, they could toss any temporary show into if they needed something for capacity like they do for HHN (though I don't think capacity is the issue at this park) until they are ready to invest more, there.
To me, IOA is the one in real need, especially for lost continent and especially for more in the way of indoor attractions since currently, most of this park's biggest headliners can't run in bad weather.