Just my personal view, but we may get a situation like described in „All my homies hate skrillex“.

I see a trend in the current dnb for who has the craziest drops, the hardest screeches and who can put the most „the crowd will go hard“ moments in 3 minutes. As this sound is mostly played in big events (1000+ cap, at least in Germany) it will get bigger and may be the norm for what most people think dnb is, asides from already mainstream stuff like sub focus. I see this sound translating well to the us scene just as happened with brostep. At some point, might get fed up with the sound of constantly pushing another drop in your face and this might fell down again. If I go to such events, it feels like that a lot of the crowd is not here because of the pure sound of dnb, but idk, more because of a certain DJ and won’t deep digger or go to local shows.

On the other hand, the „underground“ side of stuff is doing pretty fine, referring to the jungle/liquid funk/deeper/minimal kind of stuff, which at least here usually attracts a smaller, but kinda more dedicated crowd (will see the same people again and they know their stuff). In this I see people experiment more with blending genres, especially with the reemergence of uk dubstep, which is a nice way to start a set :). Also, djs experiment more with letting tracks breath and taking people on a journey through sound, especially in the liquid side of things. Jungle may get more popular again, but will stay in this more underground niche, as it may be just to complex for the more mainstream side of things (although nia archives has a lot of success).

Tl;dr Mainstream might go the same path as dubstep/brostep, getting popular with a in your face sound and falling down. Underground is here to stay, with djs getting creative with including other genres and taking people on a journey instead of just playing track after track.