To make the shrimp: Marinate the shrimp in the olive oil, chipotle chile and chipotle sauce for at least 10 minutes.
Place the shrimp in a large hot skillet and cook over medium-high heat until cooked, about 2 minutes per side. Season with salt and pepper and set aside.
To assemble the arepa: Spread the mashed beans mixture on the arepas. Top with guacamole, shrimp, some sour cream, lettuce, cheese and salsa, and the fresh cilantro. Serve with lime wedges.