Something more along the lines of luxury opposed to sporty. That being said, they're interiors really haven't been anything special, but they are comfortable. Looking at the Trackhawks interior, if you sat in there without the badges that say anything, you really wouldn't think you were sitting in anything special.
For the Grand Wagoneer, I would like to see a fair bit of wood grain trim, some diamond stitching possibly, and premium soft feeling leather.
As for drivetrain, a part of me really thinks they'll just stick a 5.7L in there