No, just no. I love SSB4, and the fact that some of us will get Mewtwo for free is nice, but I don't want SSB to be the next Battlefield/Call of Duty when it comes to DLC*.
I'm okay for a bunch of characters and stages, like what Nintendo did with MK8, but items as DLC sounds ridiculous, and would even cause trouble with online matchmaking (filtering DLC users and people not using the DLC).
*meaning here: Lots of priced DLC, with most of them not really worth their price tag.