The game comes directly from Nintendo eShop, you will be able to go online, get updates etc.
After setup process the game will be available to launch on your own account, just as any other game or app you purchased directly in Nintendo eShop.
The Mushroom Kingdom has been torn apart by a mysterious vortex, transporting the chaotic Rabbids into this once-peaceful land. To restore order, Mario, Luigi, Princess Peach, and Yoshi must team up with a whole new crew: four Rabbids heroes! Together, they will battle with weapons through four worlds filled with combat, puzzles, and unpredictable enemies.