My opinion is WotC has got plans about a d20 Modern 2.0. and this should can be used in different types of franchises, as Transformers, or Fortnite: Save the World, and also easy to be adapted to videogames. But the d20 Modern suffer a special flaw I name "Cobretti effect", because the game is a survival horror as Silent Hill or a battlefield if PCs have got enough weapons and item. In the movie Cobra Brigitte Nielsen couldn't face the night slasher, only to hide and run away, but Marion Cobretti, played by Sylvester Stallone, with enough ammo, could kill all the members of the cult of the new dawn. In the first movie, Alien the eight passenger, only a xenomorph could kill almost all the crew but in the James Cameron's sequel they could kill dozens, maybe hundreds, with a remote-control sentry gun from other room. How should be the XPs reward if a monster is too easy or hard in certain adventures?
The epic-mock RPG could be used also like a "pilot episode" to try recover forgotten franchises, for example Inhumanoids or Princess Gwenevere and the jewel riders. But this also should be with some videogame hook, for example skins for Fortnite (mmmm, a skin of Pepa Pig, husks-slayer).
My own idea about a crossover between D&D and other Hasbro franchises is there is a demiplane, as a theme park created by the akashic record or collective memory. This place could be visited by the D&D PCs and they could meet famous characters from Earth's fiction, for example Robin Hood, William Tell, Ivanhoe, Black Arrow (novel from Robert Louis Stevenson), Miguel Strogoff, Black Corsair Sandokan or the Captain Storm (by Emilio Salgari). Some regions of this plane would be Earth for 1980's year, home of some Hasbro franchises, and other "guest artists", for example characters from Capcom videogames (Nightstalkers, ghost'n'goblings, Battle circuit, Captain Commando...).