The expansion of the Colorado Convention Center is getting back on track after allegations of corruption derailed the project. But the reset could mean delays that cost millions in business for the city-owned facility. Originally, the city of Denver expected to finish the project by the end of 2022. Documents released this week showed a one-year delay, but city officials warned that it was a “placeholder” date. “It could be 2023, it could be something different,” said project manager Adam Phipps.