I used to use Splash Screens (App Wrapper features one), but new applications developed this year, I tried something different. I integrated the splash screen into the blank document. It appears to work quite well, I've attached an example below from a new app that we're wrapping up at the moment, the app icon hasn't been designed so it's currently showing the "Default" app icon.
This way every time there is a blank window it acts as a splash screen, but it's also functional. Of course when the user opens the app and it restores existing docs they don't see the splash screen, but they should know which app it is :)