Sakurai is the king of fibs.
"We have no plans on doing DLC."
>
"OK, Mewtwo's the only one."
>Miiverse and Tourney
"We're only doing a few things."
>

and

costumes
"OK, that's all we're doing. Cest Fini."
>Smash Ballot
"OK, but, we're only going to do like 2 characters."
>

, Dream Land 64 and the 3 Marios found in Smash 3DS' Data (There used to be 2, now another has joined)
"*sweats*....On another topic, I really don't feel like we should have fighting game characters in Smash."
>

, Ryu's Temple, More 64 Stages, Trophies, Songs and even more

costumes
"I CAN EXPLAIN"
Just give us King K. Rool already