IS it about the bunny??
Evil Coop showed that card to Daria right before he killed her and said "that's what I'm looking for". I ~think~ that the information on the map leads to a place similar to the Black Lounge, could be the White Lounge or some other place? Evil Coop doesn't want to go back to the Black Lodge, because he said he "had a plan" to avoid going back, and his plan worked. So if Evil C~ wants to go to that place represented by the symbol in his card, then it can't be the BL, it's gotta be a portal that leads to somewhere different.