Super Smash Bros. is one of Nintendo's flagship franchises, so it makes sense to introduce NFC with it.
Stephan Bole, managing director of Nintendo France, has just announced that the upcoming Super Smash Bros. title for Wii U will utilize near-field communication toys, somewhat similar to Skylanders and Disney Infinity. Nintendo announced that it was planning such a system of figurines earlier in the year, and now it's looking like its flagship Wii U title will utilize it.
"E3 will be an opportunity to show the use of NFC technology on Nintendo consoles. NFC will be used in the Wii U version of Super Smash Bros.," Bole told French newspaper Le Figaro in an interview.
From what we know of Nintendo's figurine platform (NFP) plans, it will support training and upgrading in-game versions of figures of various Nintendo characters; and support multiple games on both Wii U and Nintendo 3DS. Nintendo said at the time that it plans to release the first NFP-compatible titles on Wii U by the end of the year, which coincides with Super Smash Bros. Wii U release.
Bole specifically said that only the Wii U version would use NFC, which also falls in line with what Nintendo said earlier, in that the NFC technology wouldn't be utilized on the 3DS until 2015.