Bruce Wayne vs Tony Stark
Bruce and Tony Decide to make a wager to see who could do each others job the best. Batman get 5 days to learn the ends and outs of Tony's style, life and tech and Stark has 5 days to get use to Bruce's life, city and tech. While they are doing each others job they have the options to change anything they want. When they go back to their respected jobs they have to go with the changes that were made. A wouldn't this be fun and who does the best job?