Preheat oven to 350°F.
In a large skillet, cook the bacon over medium heat until crisp. Remove from pan and set aside.
Add the sausage, beef brisket, and pulled pork to the same skillet and cook over medium heat until browned and cooked through (about 8 minutes).
Add the onion, bell pepper, and jalapeno pepper to the skillet and cook for an additional 5 minutes.
Remove from heat and set aside.
In a large bowl, combine the baked beans and barbecue sauce until well blended.
Mix in the cooked bacon, sausage, beef brisket, and pulled pork until evenly distributed throughout the mixture.
Transfer mixture to a 9×13 inch baking dish and bake at 350°F for 25-30 minutes or until bubbly around the edges of the pan. Serve warm with your favorite side dishes, such as rice or mashed potatoes!