Not sure if it was mentioned previously or not, but I was at SHOT Show in Vegas the past few days as "media" and was able to talk to the Cummins and Nissan people regarding this new engine/truck.
Peak torque will be between 1200-1500rpms, not a high revving engine. Rail pressure will be approx. 32,000 with piezo injectors or as they said, "the next generation of Bosch fuel injection systems. He couldn't remember the type of fuel pump. Both the pump and turbo will be in the "V." The turbo will be a Holstet, but they aren't saying what the specs are only that it will be "very different than the VGT found in the 6.7L."
Most interestingly, the transmission... I asked if Nissan were building one in-house and he said "sourced through a third party that Ram HD owners will be familiar with." I asked, "Start with an A." He nodded yes but possibly some "improvements" being made to it.