I wanted to share my thoughts on this. Please forgive me if it doesn't make sense or go here anywhere. New faction looks cool, but I feel bad hurting things that look like a Xaku.
The train theme makes perfect sense. We have solar rails and planet junctions...
I haven't done much lore exploring with the Entrati, but I wonder if mister Entrati's train de-railed and that's how he ended up stranded in the void.
What if the specters we fight in each junction are/were the engineers on each train?
Warframe 1999 is set in the past(?), but I wonder if that's where he got the idea from.
Anyway thank you for reading my very early morning thoughts after waking from a dream.