Or maybe Retro just isn't as focused on being "efficient" as a lot of Nintendo's Japanese studios are? I think Nintendo's focus on digital has resulted in a lot of their studios making it a top priority to keep sizes down. Retro probably wasn't worried about that and as others have pointed out, between audio files and unique textures, that's likely the bulk of your 11GB right there. Not saying it won't be a fantastic game, but I certainly wouldn't go in expecting 9x as much content as Super Mario 3D World.
Upcoming Games To Get
Definite: Kirby Star Allies (Switch), Mario Tennis Aces (Switch), Fire Emblem (Switch), Yoshi (Switch), Pokemon (Switch), Kingdom Hearts 3 (PS4), Monster Hunter World (PS4)
Considering: Fe (Switch), Donkey Kong Country Tropical Freeze (Switch), The World Ends With You (Switch), Ys VIII (Switch), Street Fighter V: Arcade Edition (PS4), Kingdom Hearts 2.8 Remix (PS4), The Last Guardian (PS4), Shadow of the Colossus HD (PS4), Anthem (PS4), Shenmue 3 (PS4), WiLD (PS4)
