My idea of an amusement park story is getting adventurers to go tour environmental disaster areas. After all if the entire Great Barrier Reef gets killed which seems like an extremely lively possibility what are you going to do with all that rotting limestone?
Every time I got 'Amazing Spider-Man' or 'Fantastic Four' or another book firmly on the rails we got pulled into some big event book or crossover and it cost momentum and messed badly with the pacing and structure of the book.