Title screen graphics for a fantasy action roleplaying mobile game -- 2

I am working on a mobile fantasy roleplaying game where the player has to fight battles, with typically a group of four heroes. The game is not going to use retro style pixel graphics, but it's also definitely not using high res graphics. I have attached a screenshot of the current state of the game plus a screenshot of the current demo title screen picture. This demo picture gives an impression of what kind of picture I'd like to have for the title screen: It should show a group of four heroes who are starting a fight or - perhaps even better - who just won a fight, celebrating their victory, e.g. raising swords etc. The screenshot from the action scene of the game shows the graphics style the game is using. Ideally the title screen graphics should be using a similar style. Of course I need to have all rights for using the title screen image (commercially) in my game. Ideally the image should be at least 2048x2048 pixels, with layers for background and the heroes. Since I don't have Photoshop it might be a good idea to get these layers as separate png or webp files.