If I ask my sister in law what D&D stuff is out there or on the horizon, what do you think her answer would be? Because that is what everyone is talking about here, major penetration into the popular culture a la Marvel. That happened with D&D once already, during the early to mid 80s "fad" period. It is very unlikely to happen again.
Not impossible, of course. Anything can happen. But it certainly hasn't happened in the last 15 years of Hasbro stewarding the IP. My contention is that it is a fool's errand that disrupts and devalues the one good thing D&D does really well: let people to hang out with their friends (and occassionally strangers) pretending to be elves and wizards delving dungeons and killing dragons. When your licensing staff is equal in (small) size to your development staff, you are failing to put the resources where the need to be to make the game great for those that actually want to play it. Hollywood is littered with the corpses of failed licensed properties. D&D is already one of them. Do you really believe that after one theatrical stinker and two cable/DtV crapfests someone holding the massive purse strings necessary to finance a fantasy epic are going to release that money to a proven failure of a property versus some other license? It's a stretch at best.
On the subject of the D&D comic, it debuted with about 10K issues sold in October 2014, issue 2 dropped to 7600, issue 3 5500, and #4 with 4600. Compare that to the #100 ranked book by sales, Punisher #14 with 21K sales -- which is a pretty good comparison since Punisher is a known property that has made a couple of attempts to leap into mainstream success (and is even tied to the larger Marvel Universe) and failed. I don't imagine anyone is looking to cut a check for a new Punisher movie either.
Information from here, btw.
My point is that hedging all this hope on making D&D the next Marvel Cinematic Universe or whatever seems like a terrible way to manage the brand and the game. If D&D were in the hands of a smaller company with no designs other than to be the best selling, most played, most beloved RPG on the market, everyone would be better off: the company, the fans and the game itself. And ironically, if that were the case it would be more likely that some media empire would try and make a buck off D&D and license it for a summer tentpole or whatever.