I've seen a couple of posts predicting the death of the OSR movement now that people can licence 5e. I hope that's not the case since I much prefer the OSR stuff I have to 5e stuff (which everyone but me loves).
As long there an interest in playing classic editions of D&D, the OSR will be around.
With that being said, the general trend has been to diversify because with all else being equal the default for most gamers is to kitbash their campaigns out of whatever they like.
So I predict is that 5e will now become of that process and within 2 years you will be hard pressed to tell where publishers focused on classic D&D ends and publishers focused on 5e begins. Because there will be hybrids that will be combining various editions together. For example right now there is Blood & Treasure which sits squarely between classic D&D and the 3.5 rules.
We may be seeing a 3.5 based RPG that is based on bounded accuracy using stats and number from 5e but with 3.5 options for characters. Probably somebody working on a ruleset that could only be describe as a mash of classic D&D, Pathfinder, and 5e.
I am sure any 5e publisher interested in expanding the Warlock and gonzo fantasy is going to be looking to incorporate what works for them from the DCC RPG.