This hasn't hit the radar here before much, but some investors have built a very nice club circuit not far from New Orleans. It's unlikely they'll ever be able to attract a NASCAR date, but they do have two 2.5 plus mile road courses with long straightaways, wide runoffs and VIR style condos. They've already made sizeable investments in infrastructure and allegedly the track is up to FIA standards so it wouldn't be a huge reach for them to upgrade for an Indycar event. It's still a good bit away from having the infrastructure and safety measures in place to host an Indycar race, but it's getting there. I have a friend who turned some laps there on a bike earlier this year and said they're on pace to rival Barber and VIR when it comes to driver amenities.
The track owners have said there is no plans to pursue a NASCAR date, but haven't ruled out an Indycar weekend. Zoom Motorsports, the promoters at Barber, are looking to expand, and NOLA and Birmingham aren't that far apart, but are entirely separate markets.
To me it looks like it could be a good win for the series. It's a market that NASCAR hasn't/can't reach. It's very close to downtown New Orleans, and it could provide a early spring/late winter date that Indycar needs.
Here's some more info