everyone

That sounds like a desperate move.At the end of the Adam character short, he drops his mask and kinda stumbles away, like he just went through a great battle.Looking back on his "great battle" he fought Blake and Sun briefly, probably not enough to get truly injured or at least break a sweat. He's not as injured as Hazel, Mercury and Emerald.He may not be injured physically, but I'm betting he's injured psychologically. Look at if from his point of view. He was ready to strike back at the humans by blowing up an academy, with his army there to back him up. (Yeah, 8 people are "totally" an army) Then his ex shows up, hopefully to rejoin him and his cause. She opposes him, seemingly alone. He gets cocky. Thenarmy shows up, AND the police. Adam tries to blow up the school withthere and fails, his "army" are all "WTF?!" A brief fight ensues between the "armies", the White Fang give up, but Adam doesn't. He confronts Blake again and she basically tells him he's not worth her time. That hits Adam in the ego, the brief battle mentioned above happens and he runs.Who knows what happened between his last appearance in Vol 5 and his character short. Maybe he reached Hazel, Mercury and Emerald, some harsh words were exchanged, maybe Mercury fought Adam a little and they left him behind. Then it all hits Adam at once, everything he did with his life. At the end of the short, he should be mentally drained.Dropping his mask is symbolic that maybe he's had enough... or he'd just be less recognizable without it and could evade the authorities easier. I don't think anyone in the current cast knows what he looks like under the mask, maybe not even Blake.Next time we see him, he'll either be found fighting off a Grimm and losing, or he'll be a hobo because at this point he's on the run from everybody.