The only reason the type BBQ sauce is going to matter is how sweet you want your finished product. Dr. Pepper is sweet, so my 10-2-4 BBQ sauce is intentionally pretty sweet. I think the sweet pairs nicely with the richness of the pork belly. If you want a little less sweet, then get a less sweet sauce. If you want a little kick, get a sauce with some spice.
I didn't really measure anything out for the glaze, but this will get you a nice glaze:
1 c. BBQ sauce
1/4 c. Dr. Pepper
1/4 c. Huckleberry Jam
Combine everything in a pan and heat on medium to med-low until everything is blended and smooth. Pour over your burnt ends and give 'em a toss to coat everything. Then stick it back in the heat uncovered for 15 or so minutes. What you're looking for is that glaze to get sticky.
As an alternative, you could swap out the Dr Pepper for Cherry Coke and use with Cherry Preserves for a cherry glaze. Or Apple Juice and Apple Jelly. Or Sprite and Apricot Jam. Or...
Okay that makes sense. I’ll probably use the kc masterpiece since it has a little spice in it. I’d like a nice spice-sweet mix. I’ll be making these Saturday, and maybe again Sunday if they turn out good!