Possibility of a 5th Streetpass game?

[Otakumegane]

Well Nintendo recently released 4 new games for Streetpass Mii Plaza but if you look at the bottom screen....

There are 8 spaces. 1 for the plaza, 1 for Puzzle Swap, 1 for Find Mii1+2, then 4 for Mii Force, Flower Town, Warrior's Way and Monster Manor.

There remains a single unused space. Might this be a placeholder for another Streetpass game? 

I also released when Nintendo was talking about Free-to-play, I guess the Streetpass Plaza qualifies.