: The most successful "X" storylines often function as romantic thrillers , combining high-stakes tension with deep emotional connection, as seen in classics like The Bodyguard or modern hits like The Adjustment Bureau .

Modern romantic storylines frequently utilize an "X" element—a variable that makes the relationship fundamentally difficult or culturally "unknown."

: Unlike some Star Wars or Indiana Jones entries where romance can feel forced or secondary to the plot, modern features prioritize "canonical romance" where the development feels natural and essential.