Premium currency Mythril is no longer for sale on the Nintendo eShop, and the in-game store will disappear on January 6th (JST).
Each season will last roughly two seasons and come with its own Prize Pass. Final Fantasy 7 protagonist Cloud Strife will be part of Season 1's Prize Pass.
The free version offers access to limited characters, local and online multiplayer, Story Mode Prologue and the 64-player tournament mode.