Hasbro is suffering the USA-China trade wars, but it has got still a great future, at least better than Mattel.
I guess Hasbro doesn't want to be bought by Disney because it would be "all eggs in only one basket" and to enjoy complete independence.
Most of D&D 5th Eds are modules or refritos (refried, recooked), remakes of old things. Really no-module new sourcebooks are Acquisition Inc and Ravnica. The new class "monster slayer" isn't published in paper sourcebook yet although it is canon, isn't it?
Now the strategy is not to publish more books but to increase the number of players and fans. The next step will be to create a d20 system to be used in different genres. This is a true challenge for game designers because monsters are too dangerous or weak if PCs have got enough weapons and item. Do you remember Sebastian Castellanos in "Evil Within"? In the beginning he had to hide like in a survival horror, but later it was a battlefield like a standar shooter. In the DLC "the executioner" the PC as the Keeper, the boss monster with a safe as head could kill some monsters with only his hammer. D20 system isn't ready yet for a "G.I.Joe vs Transformers" or superheros as alien invaders.
Maybe Hasbro would like to use the d20 system to create a skirmish game (as Mordheim or Necromunda) to be a competitive e-sport, but it would need a lot of playtesting and work by game designers with questions about balance of power as to hire a warmage or a gunslinger, more magic item or gunpowder.
* Now I am thinking about if Hasbro publishes a "Endless Quest" board game with easy rules for +7y children then other companies could create their own clones using the open licence. And some fans could publish their own amateur "mods".