This is Morgan Black, Baron of Staten, who lives on the 14th floor of the crumbling rockheap he swears to be his childhood home. He has a gun and a horse, and a coat of mail. The gun has no bullets of course, but it makes a good club, and Morgan likes the way it looks in the holster on his belt. There's a big old sturgeon in the Old Hudson that talks to Morgan, the sturgeon brings him secrets and tells him the weakness of his enemies in exchange for potato chips, which to the big fish are better than gold. There's a tree that will grant Morgan wishes, for a price.
Every where he looks, Morgan sees another conquest.
Post-apocalyptic meets pseudo-Arthurian fantasy with a huge dash of anachronism thrown in. A modern landscape that feels like it's ripped from a dream you had falling asleep while reading The Dark Tower and Neverwhere at the same time.
The landscape is filled with spirits called dreamers, who play out their petty stories, using the characters as pawns and bait, while larger forces twist and rewrite the world around you.
I see maybe a mechanic where players both play a character and a spirit with a lot of bartering and intrigue offering boons and granting small wishes to other characters in exchange for advancing their agenda.
I see turning familiar things on their heads and characters fighting to protect a single cul-de-sac in their hometown, or setting off to bizarre and exotic destinations in search of glory and understanding themselves.