When Amazon announced last year that it was entering directly into the air logistics business with the launch of Prime Air, the airfreight world knew that it had to prepare for bold moves by a deep-pocketed company with a passion for innovation. Now, the Seattle-based online retail giant has announced the shift of its current air hub from Wilmington Airpark in Ohio to the Cincinnati/Northern Kentucky Airport this spring, hinting at a possibly vast expansion of Amazon’s e-commerce air service.