Pulled Pork Grilled Cheese

Name: Pulled Pork Grilled Cheese
Ingredients: FOR THE PORK:; 1 Tablespoon Chili Powder; 2 Tablespoons Brown Sugar; 1 teaspoon Cayenne Pepper; 1 Tablespoon Kosher Salt; 1 teaspoon Black Pepper; 1 Tablespoon Garlic Powder; 6 pounds Pork Shoulder Roast; 2 whole Red Onions, Sliced; 2 cups Chicken Broth; 16 ounces, fluid BBQ Sauce, Store-bought; FOR THE SLAW:; ½ heads Green Cabbage; ½ heads Purple Cabbage; 3 whole Large Carrots, Julienned; 1 whole Green Bell Pepper, Diced; 1 whole Yellow Onion, Sliced Thin; ¾ cups Mayonnaise; ¼ cups Dijon Mustard; 2 Tablespoons Sour Cream; 1 Tablespoon Granulated Sugar; 1 Tablespoon Apple Cider Vinegar; ½ teaspoons Kosher Salt; ½ teaspoons Black Pepper; ½ teaspoons Cayenne Pepper; 1 Tablespoon Hot Sauce; ¼ cups Fresh Cilantro, Chopped; FOR THE SANDWICHES:; 3 Tablespoons Unsalted Butter, Softened To Room Temperature; 20 slices Potato Bread