Some dude on 4chan (please, no, don't throw that at me, I am taking this with as much salt as you are) is saying this Smash will be subtitled Calamity. The post is not outlandish by any means, it doesn't contain any obvious debunkers like K. Rool being among the newcomers. "The trailer is almost entirely CGI, about 1:35 long and has the following characters showing up: Mario, Link, Pit, Kirby, Pikachu, Mewtwo (in his new X/Y form), DK, Captain Falcon, Fox, Samus, Peach, Zelda, Palutena, Olimar, Ness, Ice Climbers, Shulk, Marth, Tharja, Yoshi, Bowser, Sonic, Pac-Man."
I think it's clearly fake even with the Nysanya precedent in mind, because A) he says the Japanese title ( 大乱闘スマッシュブラザーズ災 ) will include the word "wazawai", which showed up a LOT during and after the Fukushima disaster and B) he says he couldn't do anything but watch but he still says the characters will appear in the trailer in the order he wrote down. Yeah, no, not that many people have photographic memories.
You don't have to tell me this is almost certainly bullguff. The Nyasenya leak happened close to launch, but this chump supposedly saw the first trailer before E3. Very unlikely.