I tihnk there will be channel lineup changes to the Hulu Live TV.
From this list, there are still several channels that might be operating that are owned by Disney and not in Hulu Live TV
List of assets owned by The Walt Disney Company - Wikipedia
For example, Disney owns 50% of A&E Networks, so it might try to get all the A&E channels or at least four more on Hulu Live TV. Missing from Hulu Live TV but owned by A&E are Crime & Investigation, FYI, History en Espanol, Military History, Lifetime Movies, and Lifetime Real Women.
It also owns LiveWell which is a subchannel on many ABC O&O stations, although Disney isn't adding any new content to that network and isn't even adding new affiliates. My local ABC owned station also airs Laff but the Laff network is not owned by Disney. I think the Hallmark channels (although not owned by Disney), would be complementary as well. I have doubts if Disney would pursue the Viacom group of channels. It already has so many channels without them.
If YTTV is $49.99, I could see Disney easily bumping up Hulu Live TV from $44.99 to $49.99, while adding some channels. Disney is a company that has no qualms of bumping the price up - just see the ticket prices for DIsney theme parks.