Genesis has teased a pair of new flagship two-door concepts at the Seoul motor show.The X Gran Coupe concept and X Gran Convertible concept showcase what two-door versions of the flagship G90 limousine would look like.There is no confirmation yet if these concepts will go into production.The concepts feature key design cues expected of a Genesis model, including split-level lighting, crest-shaped grille, and wraparound headlights.