I think Nitro and El Toro Will Defiantly still be in the park in 15 years.
maybe KK but the problems they have with it...once its beaten i dont know how long they will have it there if it breaks again like the last time.
I could also see some new water rides in the park not Harbor.
probably some quality flats.
and i would hope a re-theme to a superhero theme instead of The Western section of the park