Mobile game promotional images

This is what a business in Japan was looking for in their poster design

We are looking to get new promotional images for our mobile game "Shiba Wars" (https://play.google.com/store/apps/details?id=com.Shibamaru.com.Shibamaru.GoddessDefense&hl=en&gl=US)

Our current ones are too basic so we would like something more professional & detailed. A good reference is from the game "Arknights" (references attached). Something similar to this style would be great. Some reference styles/layouts are attached named "reference1/2/3/4".

I am attaching character artwork from the game, along with in-game screenshots to be used. More are available upon request.

Similar to the references, I think the character artwork should be the highlight of the promo. The text itself isn't as important, but here are some that you can use (you can mix/match, come up with new ones, etc.)

"Build your team of Goddesses and defeat the enemy"
"Collect characters and level up"
"Play exclusive in-game events and earn rewards"
"Take on c… Read more