Place the seasoned chicken thighs in a baking rack and bake until internal temperature of chicken reaches 165 degrees, which should take about 30 minutes.
In a large pan, cook chopped bacon until crisp and remove once cooked. In the same pan with the bacon grease, add chopped jalapeños and cook until softened and edges are browned.
Add cubed cream cheese, mayonnaise, and hot sauce and cook until cream cheese has softened and all ingredients are well-combined.
Once the chicken has finished cooking, transfer it to mixing bowl and shred using two forks. Mix in crumbled bacon and cream cheese mixture.
Transfer the mixture to the baking pan and spread it into an even layer. Sprinkle shredded mozzarella and shredded cheddar atop.
Transfer baking pan to middle rack of oven and bake for 10 minutes before turning oven broiler on and broiling for 2-3 minutes.
Allow casserole to cool slightly before cuttinginto pieces.