Do you reveal battlefields before or after the player that won the dice roll decides who starts?

Ruling: You reveal battlefields before the dice roll and before choosing turn order.

Sequence:

• Reveal Legend
• Reveal Chosen champion
• Reveal Battlefields
• Choose turn order
• Mulligans

Nuances:

• The battlefield you pick in game 1 is supposed to be done without the knowledge of who's going to go first
• You cannot roll a dice before sitting at the table to determine who will choose turn order, because then you could pick a battlefield depending on that knowledge