I live about an hour from New Orleans. It barely has the infrastructure and corporate support for the 2 pro sports teams it currently has. I know it was a popular thought for expansion when the Superdome first opened, but the building is almost 50 years old. It's been renovated a few times and has held up for its age, but its baseball configuration wasn't ideal. You would need a new stadium. The New Orleans outdoor climate is slightly worse than Houston's with probably more rain on a regular basis in the summer. So it would have to be a dome or a retractable roof (though you probably wouldn't play with the roof open much) and neither New Orleans nor Louisiana could afford that without some private contributions.
But, this is OOTP, so, thankfully, you can do whatever you want!
