My vote would be 2 at first also, which could go for portrait
But then the layout of the 1 could go on the landscape apps. things that they could trigger depending on Stage orientation event like said Adriana
In any case they should definitly think about to switch to a black background splash and to reduce the " contains adobe (…) ".
AIR deserve a better splash screen which valorize the branding, and not to harm it.
This screen must say " AIR " is alive and will continue to be for long time