I'd love to combine classic ARPG and RTS gameplay, but where that mix is usually an RTS by way of ARPG mechanics, I'd want the mix to be more of an ARPG by way of RTS mechanics. Instead of Dawn of War 2, think "Age of Mythology engine used to recreate Diablo".

My idea:

A horror game where Willy Wonka has been kidnapped and you are his brother trying to save him. Make your way through the now old, abandoned Chocolate Factory and rescue him!

Something like Armored Core - so an action mecha title with customizable vehicles and repair needs - but all the missions are disaster relief or response!

Assisting evacuations, forming mobile flood walls, high-tech search and rescue in extremely hazardous environments!

I Think Making Lore To Your Game Expands More Story.

An open world survival game set during post Roman Britain during the early Anglo-Saxon period