I'm probably going to get excoriated for saying this, but so be it.....
The power of the D&D "brand" is overwhelmingly overstated. To the average Joe or Jane Public, it's not even the most recognizable "fantasy adventure" brand, as that title would be held by Skyrim, Lord of the Rings, Game of Thrones, or World of Warcraft in some order. Since Neverwinter Nights 2 was released in 2006, I can't think of a single product--tabletop, digital, or otherwise--that I either bought or considered buying simply because it had the D&D logo blazoned across the packaging.
Consider --- Sword Coast Legends is getting absolutely destroyed in the marketplace by "off brand" competitors Pillars of Eternity and Divinity: Original Sin. In the case of Pillars of Eternity, it's not even based on an existing IP of any kind. It's a completely new fantasy world. Consider also Dungeons and Dragons Online (DDO) and Neverwinter Online --- they've been moderately successful, but are decidedly a niche within a niche in the overall MMO scene.
Sure, the D&D 5e tabletop game has been an unqualified success. But if the goal is to "monetize the brand" in the same way as say, Marvel Comics, in terms of large-scale "branding" the RPG itself does very little to achieve that goal.