Nah, they'll keep AT&T TV because they'll want/need a traditional-esque cable TV service (i.e. more than just HBO Max) to sell to their AT&T Fiber customers. And since they own a clutch of popular cable networks, MVPD economics are better for AT&T than a comparably-sized broadband operator who doesn't own any networks/content. So it seems very unlikely to me that they would just exit the MVPD business completely and opt to resell YouTube TV as, say, Verizon Home 5G does.
Remember, back before AT&T acquired DirecTV or TimeWarner, they had Uverse TV, which is now completely replaced by AT&T TV for new sales. So even if DirecTV goes away, they'll keep AT&T TV around as the successor to Uverse TV (although the AT&T TV channel packages and pricing may very well change). The fact that AT&T TV, unlike Uverse TV, can be sold to consumers using other broadband providers is a bonus for them, although I don't think that's where they're going to ever really focus their sales effort.
Now that Stephenson is no longer the CEO, the company can seriously explore the possibility of spinning off DirecTV. Who knows, behind-the-scenes talks with Charlie Ergen may already be underway...