Really depends on Universal's strategy and what they end up prioritizing.
Both the Rockit and Supercharged replacement are not the most expensive/resource draining projects. So another project for USF is not out of the question. They did Transformers, Springfield and Diagon all in a 2 year timespan. And that's ignoring all of the hotels under development and CityWalk's redevelopment.
I think it really depends on whether or not UOR wants to invest into IOA again. Epic will need capacity improvements, and USF needs a larger draw. IOA, while it has its shortfalls, can live with very minor investment (probably focus on refurbs for JPRA, FJ, etc.)
While UOR is more than capable of working on multiple projects, I am cautious about other projects (Unleashed, UK) limiting investment/resources while UOR acts as the cash cow to finance all those projects.