This is how to skip the Funcom launcher, intro movie, and company logo splashes. You can change the launch options in the steam properties for this game. eval is just a way to run a concatenated command through a subshell. The Windows wayt will obviously not work.
eval $(echo "%command% -nosplash -nostartupscreen -continuesession" | sed -e 's|/Launcher/FuncomLauncher.exe|/DuneSandbox/Binaries/Win64/DuneSandbox_BE.exe|g')
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nosplashskips the Funcom launcher -
nostartupscreenskips the developer and publisher company logos -
continue sessionskips the into movie