I don't like the terms in what it's formulated, as it would fall down much photos i feel free. However, i don't think [[Image:Pringles (aka).jpg]] free, and [[Image:BibelTV-logo.jpg]] is a {{logo}} for me.
I like the way Anthony tries to go. Useable under the rules of more than one project is not good for me. e.g: dewiki & dewikisource? It'd be the image is free under the terms of X projects (as English Wikipedia is not usable). What really matters is probably the scope of the licensing. if an image is free on EEUU and Europe, it should be allowed on commons, while not being copyrighted on Brunei is probably not.
The problem with the {{Logo-Germany}} is that it's a box-for-all, quite similar to the fair-use. If it's PD on the trademark registration country, it should be ok, but *who decides the ineligibility?* Quite problematic. But i wouldn't go so far as your proposal.