Option to go one of two ways at a certain Town Hall
For instance, let's say at TH5 you have to make a decision before upgrading to next TH. there will be the light or the dark. As we know the castles are upgraded to look more dark so if a person decided to go light they would be able to access troops that are unique to the light and vice versa. Of course some spells and troops and traps will remain accessible for both but it would be awesome to have that option. It would also be a great way of sorta rebooting the people who are TH10 and are getting kind of bored