They do produce a little Renegade based pickup. It is called the Fiat Toro, and you can't get one here.I think it's that flexibility that your proposed dakota has that may undermine the Jeep.
Jeep has very few options to click. They are all 4wd, and most of the trims are a difference of materials not capability, rubicon and mojave excluded. Plus the Jeep price tag.
Dakota arguably offers more. By allowing rwd versions, it should tow more, have more body configurations, and different drivetrain options. And will probably be cheaper with no off-road duty suspension.. Even if it's street oriented, i think the dakota would win at least 50% of the time.
Here's another idea.. speaking of comanche.. what about if they actually produced that little renegade based baby truck?