A tweet from a former art director at Portland-based advertising agency Wieden+Kennedy -- the agency that made Nike famous -- appears to display a functioning version the Nike Mag. Underneath the photo is a simple caption: October 21, 2015. That, of course, is the date Marty McFly travels to in Back to the Future II. It would also be the perfect date for Nike to finally launch the power-lacing Mag. The tweet seems to indicate just that. Keep your fingers crossed, and stay tuned for future updates.