I wonder if the next step should be acquiring other videogame studio, or a merger, for example with LEGO or playmobil. Why not a licenced pack of D&D for playmobil? I don't advice expensive big boxes, but cheaper and littler, as bait for children who start to collect. I doubt seriously a merger with GW. If Mattel is making money with Barbie, then they will want to keep their independence.
I suspect this and the next will be years with a lot of troubles, changes and surprises, and not only in the entertaiment industry. We will can see true giants to fall, and mergers we couldn't guess now.
Maybe Hasbro needs a mon ( = collectable and trained monsters) franchise as Pokemon or Digimon.
If a 3PP can't be survive for a long time, like a vulture WotC could ask a meeting to talk about buying their IPs.
If the rumors of Fortnite 2 are true, with a new creative mode allowing different styles, then Hasbro could be very interested into talking with Epic Game about partnership.
I imagine licenced IPs in D&D Beyond, even Disney franchises in D&DB using other game system. But then the VTT would need the creation of no-medieval fantasy scenery.
How would be D&DB if players could created horror "interactive novels" based in the comingsoon Duskmourn? It would work like a gamebook but with images and some motion picture.
There is a bet of D&D as a webcomic, but currently it is a little bet. Birthright could be a better option for a hypotetical future D&D romance manhwa.
My theory is D&D to be more popular in Japan it needs a new setting created by Japaneses with their own style, with a Western culture look but Japanese essence. (Sorry if I can't find better words to explain it). A D&D anime version of Power Ranger is not so impossible, it would be like a medieval version of Mystic Force and mixed with mystic knights of tir na nog. (it is a crazy idea, of course, but it is so crazy even it could work).
5e is not ready for Gamma World franchise to be added to D&D Multiverse, but with Magic: the Gathering the things can be different. Gamma World as IP could work as "hidden pilot episode" of other franchises.