Sounds like you have a base for a bbq sauce
Well I like the sound of this. Care to expand on how to do this? Is this basically just AST's starch deal?
You could do that or do a lot more to it. At it's present state, you probably have a great starter for the sauce to build on. Here is what i'd do:
Strain the remaining liquid into a container (at this point you can let it cool, store in the fridge, and do this later, or keep on cooking), set aside
Butter a decent sized sauce pan
Add Diced Onion, cook until transparent
Add two crushed Garlic cloves and potentially some peppers if you want to add some heat, cook until fragrant
Toss in the liquid, scrape any bits off the bottom of the pan,
Bring to a simmer
add spices to desired flavor (salt, pepper, cheyenne or chili chowder, cumin, maybe some fresh thyme)
add either tomato paste and/or some stewed tomatoes
add molasses and honey
add lemon juice
add yellow mustard or whatever mustard you prefer
add brown sugar
add apple cider vinegar
Simmer until satisfied with consistency, or until integrated, then adjusting consistency with the slur AST talked about earlier. strain and use. As always, taste as you go and adjust accordingly.
The fact that you used Dr. Pepper may be sweet enough and you could probably do without some of the sugary components, but that should be a decent sauce.