We will get something via a press release, but a reveal? We won't even get close to one. The investors won't be able to get much out of them either.
Looking at the past we can guess that....
1. We will hear a release window -- the battle between team 2016 and 2017 may finally be put to rest!
2. We will find out when the system will be revealed.
3. If we are extremely lucky we might find out the name -- this happened with the Wii, DS, and 3DS, but those were two handheld systems (and the names at that point were tentative) and the Wii was a special case since it's name was controversial (they wanted to give people time to let off steam before E3) and the system had already been shown off considerably by that point.
If you expect anything more than the first two things I listed you'll likely be disappointed.
Bets:
1. If the Wii U sells closer to 10 million LTD by 1/3/2015 I win. If it sells closer to 9.5 million LTD by 1/3/2015 OfficerRaichu15 wins (winner gets 2 weeks of avatar control)--Lost.