Yep! That's the plan! That way, people won't have to play out meetings again. In Wan's case, depending on his canon point, he's free to use any element he pleases. For other characters, it's best that players refrain from using a subset of bending unless they plan on using their one-time waiver on the subset prerequisite. That goes double for the special subsets (truth seeing, lavabending, combustion, astral projection and bloodbending), as those will be given out far more sparingly. This way, players won't have to retcon any bending that may occur when meeting others.