It's the prime reason, I didn't get D4 yet. I don't trust the "it's all only cosmetic" spin, they are drumming up. Battle Passes exist to make money, they don't exist to make gamers happy. So, I'll wait and see until we exactly know what's in the battle pass, and how obnoxious they advertise it and what kind of nudges there are in place to fork over money. If it turns out to be something that indeed can be ignored, I will probably jump into D4. If the battle pass cannot be ignored, I'll stay away.