A Crossover with star wars and sekirei . I mean if minato's mom and dad can find an alien ship then why not him. A SW (Star Wars) Xover would be easy because in the SW intros they say it is in a galaxy far away so you won't have to much trouble mixing different world's and rules from different stories like most Xovers do. Really why hasn't anyone did a SW Xover yet their both dealing with aliens so easy to do in my mind though i'm no writer myself so i guess i'm no good judge on whats easy or not.