I have seen the Nemesis event handled in various zones (complete with AV death and badge) other than the listed zones. Likewise Ritki invasion. Once in a great while the zombie apocalypse. But even so, these are still pretty standard zones I remember. Cap, Skyway, etc... I doubt Gold side or the less travelled (accessible) zones have had much success. Sure, those of us that know how to get around think "i can be anywhere in 20 seconds...well, any zone) but that is not the case for all players.