If you wanted to shut people up about adding another Link, you could do one of those 'Dark Link goes through a mental turmoil' deals, where whatever good he has in him embodies itself into a whole new character. I'd say White Link for that if you go with it. Deku stick had to have some sort of effect, right? And the good thing about that sort of thing is it wouldn't have to be a static character. Just in and out and it's always there for future cameos if you decide you like it.
Aside from that:
Saria love affair. (We all know Link wants to tap that, no matter what color he's wearing.)
Gorons.
Lara Croft
MMORPG crossover in dungeons
MOAR supercock jokeZ.
link3740
keep a few awards with the easter eggs. also, have you considered another dungeon with a fire dragon boss. or even a water temple jokes with Red: "If we have one more difficult trap or trick this boss will eat my cock. not you cojiro."