What can I use to substitute apple juice in a preparation of ribs? I am using a quick prep of ribs on a UV grill (that doesn't really hold a temp under 300'F; qed, no long slow cooking). I saw one other answer here where the ribs are wrapped in foil and quasi-braised in apple/pineapple juice.

Basically it goes like this: (1) trim, apply rub, and grill at 300'F indirect heat 30 mins, (2) wrap in foil with apple juice for 30 mins (which is supposed to quasi-braise the meat), (3) finish grilling apply bbq sauce.

Unfortunately I don't have apple or pineapple juice. On the other hand, I do have vanilla Coke, Pepsi, Dr. Pepper, iced tea, Sierra Mist, margarita mix, sweet and sour mix, and watery domestic beer.

From the list above, can I make any substitutions? For further consideration, I will be applying a chipotle rub and bourbon BBQ sauce.
In all honesty, I think that apple juice is just a euphemistic way of saying sugar-water.
The braising happens due to the sugar content mostly, which is why it doesn't really matter what type of juice it is (citrus excluded).
The flavour of the apple juice will be almost completely lost during cooking, so you don't need to worry about it too much.