Mass Effect/ maybe Starcraft / Star Wars theme with Warhammer 40K Mc

So think about Mass Effect combining with Star Wars (maybe forgetting about the Reapers maybe not haven't decided on that.) And I feel like I could put Starcraft in there, or not.

But essentially the main character would have a Warhammer 40K system where essentially he could become any of the chaos gods or the Emperor or anyone in the Warhammer 40K universe and he could summon them including the chaos units. Maybe losing the power to corrupt or making it a lot less powerful.

It'd be kind of like Kingdom building mixed with a good power climbing system where it's not like he can just become or summon up a chaos God super easily but maybe he could become some of the grunts of the Warhammer 40K universe at the early parts.