I've looked at a thread that talked about adding a Herobrine boss fight, but I thought it could be improved upon. They wanted it to be a rare but force you to fight him and basically made MC a horror game. I don't like that. I think that after you have beat the game (and maybe the wither and a few structures) you can do some special ritual or something to fight Herobrine, which would be a hard boss fight. I don't want something that forces you to fight him, just some way thats in the game so the people who remember this piece of MC history can have a way to have some more fun.