First, let's cover the basics. You'll want to preheat your oven to around 250-300°F (120-150°C), which is nice and low, so you don't dry out that beautiful pork. Then, you'll place the pulled pork in a baking dish, add a little bit of sauce or broth to keep it moist, and cover it with foil.
Now, here's where things get a little tricky. If you're reheating a small amount of pulled pork, say, enough for one or two people, you're looking at around 15-20 minutes. But, if you're reheating a larger quantity, you'll want to add a bit more time, so it's more like 25-35 minutes. Just remember, you're aiming for an internal temperature of 165°F (74°C), so make sure to check it with a meat thermometer.
