Hopefully this is the first crack in the door opening for non-family content coming to the service (from the Fox and Touchstone libraries, say).
I'll honestly be a little surprised if we don't get Die Hard for the holiday season. I think getting to today where the US now has some TV-MA content was honestly the biggest hurdle. Now it's about just keep rolling out some mature library catalog stuff each month to keep building more adult-oriented shows and movies.
The goal should really be to get at lest one major TV-PG, one TV-14, and one TV-MA title per month, so in effect, adding something for everyone. D+ needs more to binge and the easiest way to do that is by you know, adding bingeable titles. Modern Family, New Girl, HIMYM, Fresh off the Boat, Malcom in the Middle, Buffy, Atlanta, It's Always Sunny, etc, etc. It's not that hard, especially since they aren't caught up in licensing agreements right now, New Girl and It's Always sunny being the exception, but New Girl reverts to Disney next month.
It'll probably take about a year or more since they seem keen on rolling out an TV-MA content for Disney+ fairly slow still. If they wanted to go faster, they would've added way more of Marvel's library. I'm talking things like Deadpool 1 & 2, Logan, Legion (would've been a good way to start the FX stuff rolling in), Cloak & Dagger, Helstrom, M.O.D.O.K, Hit-Monkey, Daredevil (2003), Elektra, The Punisher films, etc, etc. Doesn't matter if it's great or a flaming turd, today was the day to go all in on Marvel stuff instead of a slow drip.
Also, like, now that we have this in place, can we please start getting some more Adult Animation on the service than just The Simpsons? Bob's Burgers would sure be a great place to start considering it's movie is coming out in 2 months and it's also probably the most PG of all of the ones 20th Century owns anyway.