@Ruin Explorer @I'm A Banana
I looked closer at the new art from Diterlizzi...
...and I noticed two faction symbols.
The first is a banner in the background on the right side of the illustration. It very closely resembles the original Sensates symbol, only there are two hands instead of a hand holding an ear on the bottom (yes, I'm a total Planescape geek and remember this stuff). After Faction War, the Sensates officially disbanded, but many continued to operate the Civic Festhall in Sigil, though others went to Arborea, joined the Mind's Eye, or decided to travel the planes.
The second is tattooed on the forearm of the blue tiefling on the right side of the illustration. The horns are very reminiscent of the skull motif Doomguard symbol, though the "ball of fire" between the horns is new. That's interesting because the Doomguard was basically exiled from Sigil post-Faction War... retreating to their fortresses near the Negative Energy Plane... their factol Alisohn Nilesia was one of the few factols to "survive" the Faction War by virtue of being sold to devils as a slave.