No. I won't believe this.
It's true. Sakurai just barely finished Kid Icarus: Uprising. It's been almost two months now so that is still not enough time to create a new Smash Bros. game. Maybe we'll still see Smash Bros. at E3, but in like a quick little video maybe.
A smart thing they can do, when they get more into development, is have a website where they release maps, characters, and items that are going to be in the game, like they did for Brawl. I can't remember the URL for that site but I remember that it really kept people excited at the brawl IGN forum I used to go to. I used to check that site every morning before I went to school. I remember people jizzed in there pants the day Sonic was released as a character. I jizzed when Wolf was.
Only thing is, a lot of people don't like to be spoiled...but with me, as long as it's not a surprised ending to a long story mode, then I'm fine.
I loved the daily updates as well! Here is the link for the site you are referring to and yes I agree that the new Smash Bros. should also do this.
http://www.smashbros.com/en_us/