According to a report from the latest Wrestling Observer Newsletter, TNT will be covering the cost of production for the TV Show that All Elite Wrestling will be producing for their Network.
Dave Meltzer would liking this deal to the the new XFL TV deal as they are getting production costs covered as well. However, AEW will have revenue coming from ad sales sharing, with a downside guarantee for AEW concerning their share.
The Observer report notes that this deal is hopefully on track to be profitable by 2020.