Here's the way it would happen if Nya is right.
The last conferences' information came out at 11 PM to 12 AM EST (maybe a little later, my memory is foggy) Tuesday night. Using this knowledge, one can assume this conference would be the same time as well as would it come a couple of hours prior to Sakurai's update. Making it completely possible for the update to happen Tuesday night at the usual time of 3 AM (not Monday going to Tuesday but Tuesday going to Wednesday... you know what I mean!! >_<) We would get the news AND the update in the same night. So, really, we just have to wait until Tuesday night so.. it's like a day and a half away.
That's IF Nya is right. I hope he is... it kind of makes sense too. They showed Snake off at TGS, that's where the Snake video came from on the DOJO!! update on... Tuesday. It was a video from TGS, that's where we saw all those screens from. It's very possible for them to show another 3rd Party character to build up more hype for the game. Of course, this is me thinking logically if Nya is right.
Honestly, I hope he is but I'll keep my hopes low...