I'm surprised this hasn't hit this thread yet. Until the new Ecodiesel comes out on the 2019, there will be just 2 engine choices both with electric assist and a "air-cooled 330 watt-hour lithium-ion Nickel Manganese Cobalt battery." Seems Ram sort of beat Volvo to the all hybrid or electric punch at least on the 1500. Lots of other MPG focus on this truck as well.
https://www.allpar.com/trucks/ram/2018-1500.html
Oh I just read there will be some fleet v8 trucks made without the hybrid.