Alliance Fleet Overview
To where other member's within the Alliance see Spies and Attack's that are launched against fellow member's of an Alliance. This could possibly then make it more beneficial to belong to Alliance. It is a kind of way to adding the protection of being in a Alliance. As then other member's of an Alliance could possibly implement a intercept. It would become a new strategy to the game.
Could possibly be a new menu selection to where it is a bit like the command central. When clicked if there is any spying or attack's running against fellow member's it show's up in the Alliance Fleet Overview.
You could also possibly make it to where the player needs to build a Intelligence Building to have access to the Alliance Fleet Overview.
This Intelligence Building you could also then possibly make it to be able to see other member's planet attack's and spies by say :
level 1 other member's planet is in same system.
And have it to where each level increases the dist between your planet with the Intelligence building and your fellow member who also has an Intelligence building.
Let's say distance of 100 per level of Intelligence Building. And make it to where both member's would have to have a level that allowed for the distance between those planets.