Who knows where "elsewhere" might be? Given the fact that the exiled are all Japanese, many with nationalist feelings, it is more than likely that Zero will try to retake Japan now with the help of the Chinese. If anything, it would make me even more worried. When Zero was about to take over Japan the first time VV himself got involved.
After that Charles was so interested in capturing CC he spared Zero. Even if "elsewhere" is elsewhere CC is still out there. If Charles' contract is related to Thought Elevators why not assume the same is true with Zero. Who is to know elsewhere is less important and does not involve another Thought Elevator? After all the precautions in case Zero regains his memories, now he is letting him go with a million strong army, Chinese support and CC at large? Doesn't make sense to me even in CG world.