With one more pack to go I'm going to speculate the abilities of the leaders. I'm also going to guess for two different abilities 1) The one I'd like to see and 2) One that might be probable but I'd rather them not have it. This way I can't be wrong.
Elizabeth: Protestant Wind-+7 Combat strength for naval units against civilizations with more naval units. Naval raiders may perform coastal raids against civs who they are not at war with. 2) Counter Armada-+100% production and +2 movement for naval units when declared war upon.
Varangian Harald: Treasures of Constantinople- International trade route provide an extra +2 gold if the destination city follows the same religion as you. 2) Gain 50 faith and gold when you raid a tile or conquer a city.
Steampunk Victoria: 1) Great Exhibition-Great Works provide +2 Science and +2 Production. Universities provide +1 Great Engineer points. 2) Steam Power- +2 movement for all naval units and for land units who move on a road.