Place pork roast in large slow cooker. Mix Coca-Cola, garlic powder, cumin, red pepper flakes, salt, pepper and orange peel. Pour mixture over pork roast. Cook on low for 8 hours. Remove and discard bone then shred meat using two forks. Discard remaining liquid in slow cooker. Taste and season with additional salt/pepper to preference.

Preheat oven to 375°F

Place each french bread roll onto foil large enough to wrap sandwich securely. Open rolls and spread mustard on both sides. Layer sliced pickles, shredded pork, peperoncini and 2 cheese slices. Close sandwiches and wrap tightly with foil. Transfer to baking sheet and bake for 15 minutes.