LOL, Sakurai seems to know of theories we have so he can deconfirm them.
Alphabetical Icon Theory? Here go some more icons to screw you.
One stage per franchise updated before release? Ok, then I'll update Mario Circuit already.
3-0-3-0 Newcomers, with the first being on the first day of the month? No newcomer December 3rd, then.
It's Sakurai's birthday/the 100th update/the original release date/bla bla? Look, a regular update!
At least one character update each week? Hello, character drought!
Metaknight not updated because he's unlockable? No, he was just delayed 'for some reason'!
At least one character (red) update each week? Let's update two AT's then on Friday!
And I laugh. =P
The only thing still standing IMO is the Icon Theory without the alphabetical part - just separated in Original/Melee/Brawl. I'll LOL when Sakurai updates Mr. Game and Watch... and his icon turns out to be #19.
About the update itself... Great update, really. Waluigi DIDN'T deserve a playable spot, and I didn't know Stafy much, so I can't tell if it'd be worth it, but at least at first glance it didn't seem so. Sorry to fans of both characters, though.