If he's actually Jergal than I'd be worried silly because Jergal is *not* a good guy, and according to 'word of god' He's behind basically every major catastrophe that's befallen Toril since Karsus's fall. Seeing him involved in a storyline that heavily involves the dead three would be 'mild' cause for concern.
He might also be Orin. In community update 21 Larian specifically says the shapeshifter could be anywhere...even pretending to be someone else in your camp.
Although I must admit it would be a lot of fun to see Jergal and hear his takes on everything lol.
