Sort of looks like a bigger or expanded setup WWE used for RAW & SD at the Performance Center early into the pandemic. The one NXT was using these past few months was basically a cramped version of the ThunderDome that just made the venue look even smaller than before.
Could see that replacing the ThunderDome if WWE has to go back to closed sets or being stuck at the PC again depending on how the coronavirus pandemic is this winter. If there was one big advantage AEW had over WWE during the pandemic era was them having their own big venue to hold shows and not having to be at the mercy of being stuck in a small gym or get kicked out of their residency due to sports.