Pro controller, if you don't have one? MicroSD card? Audio equipment? Pesticide?
What's weird to me about that stuff is that people like that act as though it's all or nothing for them. If X character doesn't show up, then all is lost.
Like, don't they have a character or two they like and play already? They have to have some investment and attachment to some character if they've been playing Smash in the first place. So X character not being added shouldn't be the end of the world.
I was ready to main R.O.B. for the third game in a row, before Ridley and Dark Samus were shown off. I would've been disappointed without them, but I wouldn't have been totally lost and forlorn about it. With over 60 characters, it's not hard to find at least one to cling to.