I think this would be a really nice ability to have. It would make it easier for tribes to coordinate attacks.
This would be nice to have... while I know this is a game, the reality of any battle/war is coordinating your troops and attacks. The more flexibility and control you have to manage this only makes the game more interesting in my mind.
That said I and a couple of others in my tribe on U.S.A. D-world have been working on an excel document that allows you to input the target coords. and get back
A. The distance to the target
B. The time to travel that distance
C. The ETA to reach the target
D. You can input a desired time to coordinate attacks and it will spit out the time you need to launch your army from each village.
We just started using this four days ago. Thus far we have seen that there are some time anomalies so that when we send the attack the server gives one time to reach the target, but logging off and logging back on; the time on the bug showing the your army does not change at a predictable rate. This has given us an accuracy of + or - about 45 seconds over the course of a 12 hour attack.
We know that the generated times are accurate because the times it spits out are with-in 1 second of the server generated times when planning up to a 12 hour attack.
Frankly I am not going to share this document because it could negate the tactical edge that our tribe will now posses in this world.
All I am saying is; it can be done.