3DS home themes are coming with the physical version (both standard and limited):
Announced via the game's official site, the limited edition comes with the game, a 2016 notebook/planner, sticky note set and bookmarks. Pre-orders are live on E-Capcom for 9,709 yen (about $80 US).
The game ships in Japan on February 26th, 2016.
U.S had better get those themes, man.