The official Russian Nintendo Store has leaked the first Nintendo Switch bundle, which includes the console and Mario Kart 8 Deluxe. This was reported on Reddit.
There will be two options available: one with the grey Joy-Con controllers and another with the red and blue neon colours. Both bundles will come with a physical copy. The bundles will most likely be released the same date as Mario Kart 8 Deluxe, on April 28, and revealed at tonight's Nintendo Direct, which starts at 11:00pm BST / 0:00 CEST.