Do I know my opponent's Legend and Chosen Champion before choosing my battlefield?

Ruling: Yes, you see your opponent's Legend and Champion before deciding what battlefield to play.

Sequence:

• Legend revealed
• Champion revealed
• Battlefields chosen
• Turn order decided
• Draw cards
• Mulligan

Nuances:

• When deciding turn order (if you have the choice), you can use all three pieces of information (Legend, Champion, and Battlefield) to decide whether to go first or second