While fans have known for some time that many of the TV deals around baseball have been an absolute mess, few Atlanta Braves fans expected that the end result for this season would be that the Braves would launch their own network. For a fanbase that has gotten used to watching their Braves games in certain ways on certain channels, this is a pretty big change that comes with a lot of questions.
Most of those questions don't have public answers right now and are going to be answered in the coming weeks once Atlanta's plan is fully fleshed out. However, one thing that is absolutely true is that whatever TV arrangement emerges from this chaos for the Braves, it will not be nearly as lucrative as the Braves' previous TV deal.
Barring an upset, the Braves are very likely going to lose significant TV revenue even with their own network
When the company that owned the Braves' TV rights was Diamond Sports (now rebranded to Main Street Sports) and they weren't mired in bankruptcy, Atlanta's TV deal was quite lucrative. It was also true that the deal seemed to be good for both sides, as Diamond only wanted to keep the Braves under their previously existing terms the first time that TV deals were imploding.
However, the TV landscape has changed dramatically over the last few years, and regional sports networks fell behind in the race to figure out how to monetize their broadcast assets in this new era. Even if it is true that the Braves, who are owned by a media company, successfully create their own network and already have a path to broadcast distribution immediately, there is no world where they will take in as much TV revenue without some pretty wild deals accompanying the change.
The only real question is exactly how much revenue the Braves are set to lose and if it will impact the team's payroll. As a publicly traded company, the facts and figures are going to be out there at some point, but not until well after this situation gets settled. With some luck, the loss won't be too bad and will be offset by the Braves' growth overall. At least, that is the hope.