For those doing Grand Prix during SDBW, they posted 2 of the 4 variants in each of the laps today:
Lap 1:
• Root Beer Speedway Stout
• Cucumbah Speedway Stout
Lap 2:
• Peanut Butter Banana Speedway Stout
• German Chocolate Speedway Stout
Lap 3:
• Chili Mango Speedway Stout
• Ginger Nibs Speedway Stout
VIP Lap:
• Toasted Coconut Vanilla Barrel-Aged Vietnamese Speedway Stout
• WaffleSmith Barrel-Aged Speedway Stout
Looks like I can immediately rule out laps 1 and 3.