Looks like the Fanta x Xbox promo also includes Call of Duty, with Black Ops 7/Warzone rewards.
If you get one of the special Fanta cans/bottles, you can scan the QR code and complete the promo challenges to unlock in-game rewards.
For BO7/Warzone specifically, you get:
- Tactical Orange Calling Card
- 1 Hour Double XP token
Promo starts around April 6 according to Xbox Site