Yes, you can absolutely return to your original park after "park hopping" to another one. Since the return of All-Day Park Hopping in early 2024, the rules at Walt Disney World and Disneyland have become much more flexible. Once you have entered your "first" park of the day (the one you may have had a reservation for), you are free to go to any other park—and you can return to your original park or even go to a third or fourth park later that same day. There is no limit on how many times you can switch between parks, provided the park you are entering has not reached its maximum capacity (which is rare, occurring only on the busiest days like Christmas). This is especially useful for guests who want to ride a specific attraction in the morning, leave for a mid-day break or a meal at a different park, and then return to their original park for the nighttime fireworks or a late-night dining reservation.