kSRO updated today its client, adding the very first arabian monster. It is a lv 120 unique called "Kidemonas" (could be translated different on the English version). It spawns on Jupiter Temple as an event on kSRO, so I'm not sure if it will be the final spawn place, but this makes clear that Arabia City, zone and cap 130 is coming really soon to Silkroad.
Some pictures of the new monster: