Apparently Cassandra Clare agrees it’s too early, as well, because she shared a snippet from the series featuring parabatai James and Matthew:
Matthew held out his hands. “Pax,” he said, wheedlingly. “Let it be peace between us. You can pour the rest of the port on my head.”
James’ mouth curved up into a smile. It was impossible to stay angry with Matthew. It was almost impossible to get angry at Matthew.
Cassie also shared some details about Will and Tessa’s lives as the parents of James and Lucie, who are the protagonists of The Last Hours.
By contrast Will and Tessa are James and Lucie’s parents. They are obviously enormously bound up in their lives, love them enormously, and are people who James and Lucie spend their lives comparing themselves to and seeking approval and love from. They are also a generation older than them. Their friends are Jem and Gideon and Cecily and Gabriel and Sophie and Charlotte and Henry. Their kids are their kids, not so much their compatriots.
The Last Hours is expected to be released