New Single Player Concept

Hello Clashers,

My idea is to add new concept to the single player battle. Besides Goblin Map, i think supercell can add another option which is:

Regularly add new challenges by adding war standard bases. It allows all clashers to learn how to attack a war base. Every month, supercell update the challenge with 5 war bases with good bonuses. Only 3 stared base will get the bonuses. this will also encourage the clashers to max their troops.

or alternative to it, goblin maps that have like 10 maps, but will be renewed with another bases after every 2 weeks. so that the goblin maps challenge wont be dead. New maps will be updated and will give clasher extra loots every 2 weeks. Absolutely new map, new challenge.

Hwo would these war bases be made, exactly?