$200 million "break in case of emergency" solution to Epic Universe's capacity and 'not enough things to do' problem:
2) There are rumors of the Celestial Goodnight nighttime show. Hopefully we get this in 2026.
3) Let's get a parade going asap.
4) and 5) Build two flat rides in Celestial Park.
6) Buy an extra HHN tent and put up a year-round haunted house (or two) at Dark Universe. This would be temporary until they're ready for a real expansion. Note that there's
precedence for a year-round house, so this isn't as unrealistic as some might think.
7) Build the Water World show adjacent to Stardust Racers, in the future expansion spot. Leave enough room so that a new future portal could open adjacent to that (I'd assume after 2030). The show could either be demolished or rethemed to a new IP when they're ready to fully expand this section of the park (I'd assume after 2035).
Everything above could be done relatively quickly (between now and end of 2027), with a relatively low budget, and could easily be replaced as they open bigger attractions and new portals. This would raise operational costs for sure (especially relying on more entertainment, between the two shows, parade, and haunted house) but I think it's necessary to get the park where it needs to be.