Add a Multi-player campaign map
The idea would be to create a very difficult multi-player campaign that would take 2 or 3 players to defeat.
You would join up with a friend or two and attack the base at the same time. The bases would be heavily fortified and require planning and coordination.
There are hundreds of things that could be done to make these scenarios unique and challenging, but I envision special heroes guarding the base. These heroes would have special abilities such as an Archer queen with high AOE (area of effect) damage, or a Barb King with high single target damage. Possibly even a unique Witch hero that spawns 10 skeletons at a time...possibilities are endless. This would make the base difficult and force the attackers think and plan how the base could be defeated.
The clan wars aspect of the game is a lot of fun for large organized groups, but there are so many smaller groups as well. There are many Clashers who have a real life friend or two that play Clash, and SC should do something to market to these close-knit groups.
Personally, I think these mini-raids would be awesome.
-T1Girr