@Yankees Lord Of Scars is a name uses for Kelsier at multiple points in the Mistborn series, he's def the Ghostbloods leader.
I don't remember that specific name, but Lord of Scars does seem like a clear indication for him coupled with the fact that Wit threatens to kick his ass again. It's been a long time since I've read the series so I could have forgotten. Anyway, we do have this...
For narrative purposes this, seems unlikely, but Honor wasn't splintered like the other Shards were; Roshar wasn't fucked up due to his passing, and the Cognitive Realm is fine. Could be setting up for an eventual Ascension by Kaladin later
I do think someone will be taking up that shard, and it could be Kaladin. Still, not really sure where that voice is supposed to come from.
Taravangian wasn't kidding when the Diagram said he should become king of everything. It's more satisfying endgame for him than saving one city.