i remember there being a discussion about whether lee actually was a "blue beast" or a "green beast".....i think the general consensus was that blue was incorrect, since both of them sound similiar and could easily have been mistaken, and the fact that he's wearing green would make more sense for him to be "green beast" anyway.
As for the people suggesting lee is gai in henge.....all i gotta ask is.....why? What would possibly be the point of gai pretending to be lee. All that does is confuse the good guys, as the enemy prolly has no idea who lee nor gai really is. It would just decieve his allies, and what's the advantage in that?