No way will Disney do anything remotely like this. There are already numerous shopping centers a stone's throw from the parks that feature all these stores. Disney would have no reason to be a landlord for yet another Target or
Best Buy. Anaheim is suburbia. It's not a major city.
The closest thing that they might try to emulate is something like a food hall or an open air marketplace style set up. In this kind of setting, they can have dedicated spaces for live music or other live entertainment (like a small fountain show or similar).