Masahiro Sakurai has been busy with Kid Icarus: Uprising for a while now, but it seems that he's finally turning his attention to the next entry in the Super Smash Bros. franchise. The confirmation of a new title for both Wii U and 3DS was actually made at E3 2011, though we later learned that the announcement was premature. With that in mind, it's a relief to read comments from Sakurai that suggest the project is getting off the ground.
Speaking to IGN, Sakurai responded to a question about what the series can do next and confirmed his goal to shake things up and make good use of Wii U to 3DS connectivity.
As you noted, there is a certain dead end we come to if we just expand the volume of the game. I intend to change direction a little as we go. The key to that's going to be its dual support for 3DS/Wii U. I'm really just getting started on this so it's going to take time, but I'll come up with something that uses that link as the game's central axis, so I hope you're looking forward to it.
It seems that a new direction for the series could be on the cards and play between 3DS and Wii U, in some form, seems to be a priority. We still have a long wait ahead of us, but at this early stage what would you like to see in the next Smash Bros. title?