If we have the 8th leg of ARA3 to Muscat, Oman then there must also be a leg starting from Muscat. Where does it go? There are over 150 different possible destinations you can reach in Europe and Africa flying from Muscat. Almost every medium-sized city in Germany and the United Kingdom is on the list. I have attempted to pare it down to the places which are better known. Here is the list for Africa:
ABJ Abijan, Ivory Coast
ADD Addis Ababa, Ethiopia
ALG Algiers, Algeria
ASW Aswan, Egypt
CAI Cairo, Egypt
CMN Casablanca, Morocco
DAR Dar-Es-Salaam, Tanzania
EBB Entebe, Uganda
LOS Lagos Nigeria
LXR Luxor, Egypt
For Europe the major places are:
AMS Amsterdam
ATH Athens
BCN Barcelona
BEG Belgrade
BHX Birmingham
BLE Bologna
BRU Brussels
OTP Bucharest
BUD Budapest
CGN Cologne
CPH Copenhagen
DUS Dusseldorf
EDI Edinburgh
FLR Florence
FRA Frankfurt
GVA Geneva
GLA Glasgow
HAM Hamburg
HEL Helsinki
IST Istanbul
KBP Kiev
MAD Madrid
MAN Manchester
MRS Marseille
MXP/LIN Milan
MUC Munich
NCE Nice
OSL Oslo
CDG Paris
PRG Prague
LED St. Petersburg
SOF Sofia
ARN Stockholm
STR Stuttgart
TLS Toulouse
VLC Valencia
VCE Venice
WAW Warsaw
ZAG Zagreb
ZRH Zurich
There are 10 African places and 40 European places. As a result I predict that a ninth leg to Europe is more likely. If that happens, then the 10th leg could also be in Europe. I think the 9th leg might be to one of the less traveled places like Helsinki, Kiev, Sofia, or Zagreb. The most logical and closest place in Europe is of course Istanbul.