Holy Mother of God...

I'm a few pages late on this, but I made something similar 2 Thanksgivings ago. Apple pie in a vanilla cake on top of a pumpkin pie inside a spice cake, I forget what kind of frosting. It was surprisingly good up until the heart attack.
Love it. Although I like your version better, k1. Chocolate and apple pie . . . not so sure about that combo. Now pecan pie and chocolate cake might work. Lord knows the chocolate pecan pies at Whole Foods are friggin' awesome. Spice cake and pumpkin pie is brilliant. Aside from the cardiac complications, of course.