Gamescom 2014 is underway in Cologne, Germany and TT Games has let slip a few more character reveals for the upcoming Lego Batman 3: Beyond Gotham. The first is the Superman killer himself, big fig Doomsday: Doomsday has arrived. #Gamescom2014 #LEGOBatmanGame pic.twitter.com/jMgcTX1POD — LEGO Batman (@LEGOBatmanGame) August 13, 2014 The second is a member of…