Surprise!
According to our G. M who is attending a zone meeting in Billings this day, the 2500/3500 will be available with a larger quad cab like Chev/Ford offers. I have taken a trip in the current 1/2 ton quad cab, and the comfort level was high. I'm 6'3" tall. The current quad cab is the replacement for the old style quad cab. It is the "extended cab" version for Dodge.
Ron