I work in that area of downtown and I'm also skeptical that this will happen.
For one, they're within a stones throw of the legislature. They want to use Halifax mall for pregame stuff, but that's literally right outside the NCGA doors. How is that supposed to work on a weeknight game if they're still in session? 22k people can make some noise. And how do sell the rural members on new toys for Raleigh?
Second, where do people park? There are three parking decks there, two of which look like they're going to be demolished to make space. Seaboard Station isn't gonna love people parking there, and everywhere else is residential or office. There's no mass transit, and there's not a ton of room to add new facilities.
If they do, or if they keep the existing structures, this seems like a nightmare scenario for traffic. Peace going west, Salisbury going south, and whatever ends up happening to Capital are your main thoroughfares with only Capital really capable of handling that type of volume. All of the little capillaries exiting whatever designated parking areas there are will be at a standstill.
It's a nice thought, but there seem to be a ton of hurdles to clear.