HBO achieved enormous success with Game of Thrones, a fantasy series based on the books of George R.R. Martin. Between its high viewership and significant cultural impact, Game of Thrones became a once-in-a-generation show. While GoT’s spin-offs have been successful, they have failed to reach the unfathomable heights of their predecessor. HBO is clearly looking for its next Game of Thrones. Could that next landmark show be Harry Potter?