The following is coming from Masahiro Sakurai’s Twitter account:
- announcements like Smash Bros. Wii U/3DS would usually be accompanied by a trailer, but the team wanted to keep gamers patient while waiting for E3
- this is why they put out just a limited announcement
- Sakurai says E3 will come with a much better announcement
- the plan is to show off both the Wii U and 3DS versions at E3
So, they plan on showing off both the Wii U and 3DS versions of Super Smash Bros. at E3 2013. Maybe we will even get some new details about the game or even some new character announcements. We will just have to wait and see.