An enormous project now underway to rehabilitate Denver’s Union Station and make it a center of transportation, commerce and public gatherings may also host an Apple retail store. In a promotional video rendering posted by the developer, an Apple logo is clearly visible during a fly-over of the final project. Although logos and signs in developer videos are traditionally speculative, a tipster says there is substance to Apple’s participation in the project. Right now, the closest Apple store to downtown is at Cherry Creek mall, 3½ miles southeast. An Apple store near the city’s downtown district and Coor’s Field ballpark would be a major destination. Union Station dates to 1865 and for decades served as a hub for east-west rail transport. But as rail travel declined, so did the station and the surrounding 30 acres of rail yards. Now a developer is ready to complete the first phase of a project to link the rail station to downtown with new pedestrian spaces, an underground bus station and new buildings that would attract pedestrians to shops and restaurants. A light-rail station opens next week, and other elements of the project will be completed through 2012.