Speculation: TV Shows: Marvel's Agents of SHIELD - Season 3 Episode 8 - ANCIENT INHUMAN
[youtube https://www.youtube.com/watch?v=ZJIAz45GdGg] Towards the end of the episode, it was revealed that an Ancient Inhuman was sent away to another planet (Ego the living planet).
Who is this Ancient Inhuman? Who could be SO VILE and destructive that they had to send his ass to another planet?
I doubt that it is Randac as he isn't really that powerful. The Unspoken however, is Over Powered.
The problem here is that the Inhuman would need to be really really old. This point favors Randac even more but it wouldn't make sense as he was just a geneticist who created terrigenesis.
The Unspoken however was loved by his people but overthrown by Black Bolt. The Unspoken isn't exactly a bad guy either.
Unfortunately, it seems to be pointing towards The Unspoken judging from the description of the powers. Both are powerful and has be sent to a different location.