This is from the Motor Trend article: The ultimate fuel-saver, an EcoDiesel V-6, arrives later in 2019 without eTorque mild hybridization (that same engine in the new Wrangler produces a Ford F-150 Power Stroke diesel-besting 260 hp and 442 lb-ft).
Sounds like the one the Eco they are going to use is already in production. Might just need to tweak it for the new truck design.
I have to say, this truck looks suh-weeeet