Planejammer. Imma keep saying it until it happens.
It's not just keeping on saying it, it's exactly the sort of concept, which on Twitter, would merit using that sort of meme.
Because like, to us, right, on this board, it's like "Oh yeah that idea that various people kick around...", but the first time I read about in here, I was like "That's so dumb... wait... maybe not... wait... that's genius!!!" which is exactly that kind of mind=blown experience. And to most random D&D Twitter people it would be pretty mind=blown.
So I actually think that's quite likely. Psionics is also pretty plausible from the same stuff, but relies on the gif and wording being more literalistic, which seems unlikely given the "seatbelts" comment which would still have to be metaphor.
Really it comes down to one of three possibilities:
1) Some kind of mash-up of existing stuff (most likely Planesjammer).
2) Psionics.
3) One of those "I can't believe they didn't already do this..." ideas.
Because nothing else is going to be a "wild ride" or "mind-blowing".