Given a significant number of the other park's major rides don't have much life left in them (HWSW and debatably GD) or have already been ripped out (TOT, Wipeout, TRRR), you may have to take direct replacements of all those attractions into consideration (given the plan for the old boneyard previously cleared for the lazy river will still be for WWW expansion). A large chunk of what Ardent is investing right now is directed towards replacing the old rides that arent in DW's best interest to maintain any longer.
Assume the coaster will trade with TOT (an investment probably targeted as such). A potential thrill ride would trade with Wipeout, and a potential family ride of reasonable size could be a direct replacement for TRRR. Then you would have to consider replacements for the inevitably retired HWSW (new coaster or another WWW tower) and GD (new drop tower or a Sky Jump conversion).
This current $50+ million investment package I expect to last until at least the end of next year, given there are still a number of announcements to be made. Regardless of time frames it should be made loud and clear to Ardent that this investment isn't a one off thing, it needs to be made on a consistent basis over time, otherwise the park will return to a situation which it was in only a year ago. So basically, what I am saying is that management need to think ahead and realise that they will soon have to invest in replacements for two of their major thrill rides that won't be around in 5 years' time.