A single bounty walks around in disguise, muttering "I'm almost in place, nobody expects a thing" but will not turn into the bounty. No other Bounties will spawn.
Those are Savages men in disguise. They are part of a mission where you uncover their identity. The bounties spawn in a single room and are Soloman Grundy, Gentleman Ghost, Ultra Humanite, and Eclipso. I think that's all of them, might have forgotten one.
Which room is that? I haven't been in the instance in a while and can't remember. I haven't had any spawn for hours.