I really hope he's not a playable character. Either his personality is going to be drastically different (he wasn't exactly super complicated back then) or he's going to come across as way too different from the rest of the companions.
I really hope it's a single quest you help him with or something. Heck, I'm not even happy Minsc got hauled 'out' of Baldur's Gate I and II for comics and stuff.
