For crossover pairings, canon length is determined by the combined canon length of the two fandoms.
For example, Julian Slowik (The Menu)/Cyan Dag (The Tower at Stony Wood) would be allowed because The Tower at Stony Wood by Patricia McKillip is 300 pages (60% of limit) and The Menu (2022) is 107 minutes (22% of limit). Combined together, they fit under our bite-sized fandom size limit: your creator will be able to consume all relevant canon within 8 hours.
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For crossover pairings, canon length is determined by the combined canon length of the two fandoms.
For example,
Julian Slowik (The Menu)/Cyan Dag (The Tower at Stony Wood)
would be allowed because The Tower at Stony Wood by Patricia McKillip is 300 pages (60% of limit) and The Menu (2022) is 107 minutes (22% of limit). Combined together, they fit under our bite-sized fandom size limit: your creator will be able to consume all relevant canon within 8 hours.