Stages are a key part of Naruto to Boruto: Shinobi Striker.
Initially, the game only had 6 arenas - but as of Version 2.39, the first new stage since the game released: Hidden Leaf Village (Snowy) was added, alongside Madara Uchiha (Six Paths).
The smallest stage to date is Hidden Leaf Village (Renovated), with the largest being Hidden Rain Village (Renovated).