No different than any other flagship model. It is very likely we won't see any significant changes until the seventh year. They put a lot of money into R&D, making and testing the body, building the engine, etc. The market will continue to buy, so there is no reason for them to change anything, let alone drop the model.
Too many people start thinking that this bike falls into the 'racer-boy' liter bike class, where changes come every two years to please the 'flavor-of-the-month' crowd.