What channels will Apple's streaming TV service have?

If and when Apple's streaming TV service launches (currently it is expected in September), the lineup is far from clear. Apple is in talks with Disney (the parent company of ABC), CBS, 21st Century Fox, Viacom and Discovery. Negotiations with Comcast, who owns NBCUniversal, have stalled (though Comcast may be contractually obligated to offer NBCUniversal content).

It is expected that the service will bundle about 25 channels, so if all goes well in the negotiations those channels could include:

Disney/ABC

21st Century Fox

Viacom

Discovery

NBCUniversal