Part of what killed Filmstruck, though, was Warners pulling their catalogue with the assumed intent of consolidating everything they own to launch their own streaming service to compete with Disney+. We’re rushing headlong into a return to the bad old days of vertical integration and Disney is leading the charge.
It won’t happen overnight; I think we’ll continue to see at least the big stuff be released on disc for a while (Marvel, Star Wars, the headliners of the Disney animated canon), but smaller stuff and movies that failed to make a splash will quietly stop showing up on store shelves. It’s already happened with the back catalogue stuff, and I would bet money that box office duds like Tomorrowland or A Wrinkle in Time will be the next thing that become “Disney+ Exclusives”.