Your source is somewhat accurate, but flawed. I have a pen pal who lives in Japan and talks to me from his home two blocks from Sora Lmtd where he hears Sakurai's monologuing tirades in the dead of night, announcing his maniacal plans.
On July 24th, Sakurai will land a helicopter atop Tokyo's radio network building and broadcast a challenge over the air: " meet me in Bikini Atoll where in 7 days, I will hold a tournament of Smash. Defeat me, and I will add Shrek, Geno, K. Rool, Marshal, Isaac, Elma, Rex, Goku, Isabelle, Simon Belmont, Waluigi, Bomberman, Lyn, Celica, Dixie Kong, Funky Kong, Bandana Dee, Decidueye, and every other character with a thread on Smashboards.com, while also bumping the game's release date up to 3 hours after the tournament. If your Challenger loses, I will delete their favorite character, add another Dark Pit variant, and delay the game one year."
My source is definitely accurate, because he noted before the invitational that there would be between 1-5 new characters, that the direct would be between 10-30 minutes, and that the game would be a Smash game with Nintendo characters.