DLC is inevitable. Brawl technically had DLC (in the uploaded stages, pictures, and videos), but even things like glitch fixes, some new additions, and online updates are bound to happen. Given how online centered the 3DS and WiiU are, we shouldn't fear it. Heck, MGS4 had an update not too long ago that eliminated long load times between acts, and that game came out around half a decade ago.
I'm sorry if I'm opposed to companies cutting content or working on DLC that could easily be in the game just for the sake of having DLC.
****, if Nintendo does DLC for Smash 4 I'll probably just wait until the Game of the Year edition comes out so that way I don't have to spend $60 + $1-5 per character or $1-5 per stage or whatever. Jesus, I miss the days when DLC was either free or when all you had to do was buy the ****ing game and you got everything with it meaning that companies couldn't skimp on content to nickle and dime their audience for it later.
Let's say that's $75 for fun.
If you take away inflation, that's about the same cost as a game worth $50 about 10 years ago.
And given that games used to be a lot more expensive (I remember buying DKC2 for like $80 after it was 2 years old! YIKES!), that's not the big of a deal for this quality of a game and this kind of game that rarely comes around (like 1 per every 3 years).
Now if we're talking about Call of Booty or the Sims, then that crap is ridiculous, and it should die forever.