Quote from Yatsufusa »On the topic of Ravnica's unknown history (which I know isn't covered in the book, but this thread is effectively the current train for the Ravnica storyline/plane discussion):
My current headcanon is the "Forgotten Gods" are simply the Nephilim and in an even further stretch, the Nephilim are simply evolved surviving Eldrazi Spawns/Scions after the Titans were done rebooting the plane that would become Ravnica. Sure, it's stated the Spawns/Scions die without their parent Titan's presence, but Eldrazi research isn't exactly the most documented of facts. We all know the Nephilim weren't exactly powerhouses compared to the actual powerhouses of Ravnica, which might fall in line since Spawns/Scions were relatively weak and if Eldrazi could really evolve, that process would take eons, so the Nephilim could just be a "teen" equivalent at best (or even just children).
Or it's just me thinking it's an awesome idea to leave little lore "clues" to imply all natural planes of existence have "remnants" of Eldrazi meddling with them eons ago, all to imply their purpose in the larger multiplanar ecosystem, but never to again bring that to the forefront, because we all can clearly attest that the Eldrazi become outright terrible "characters" (or "plot devices to be used by oldwalkers" if current record is any indicator) when they are brought to the forefront.
I think it's a good theory. I like it. But we are also a bit fixed on Gods and Eldrazi nowadays, aren't we? Remember that in the past days "Gods" were just mad men powerful enough to bind and bend the earth behind their feet to their will. They could have been Eldrazi, yes and the Nephilims might be what remains of them... (I like the parallelism between judaic Nephilim being half angel half humans and here being half Eldrazi half Ravnicans).
But they could have been a work of Planeswalkers. The Old time foolish planeswalking mad men. Nephilims might as well be their creation.
Or, even better, just some dumb creature naturally occuring, but extremely mightier than anything else. In the same fashion we might as well revere dinosaurs as gods.
But I am more than dubious about their return. It's supposed to be hinted that there might be more of them sleeping in cages somewhere inside Ravnica, but the cards referencing them maybe are just an insight on the Plane, pleasing old lore fans and completing a rich mosaic of info about Ravnican society. Nothing that foresees an advent in the latter sets I mean.
I might be mistaking in this, but I read on Twitter that on 23/1 magic story starts.