Would a solution for the NS - ICE3 issue be to rework it into the China Railways CRH3? It's the same platform, yet manufactured in China. Plus, its official name is the Velaro CN, based on the Velaro platform used by Deutsche Bahn AG, RZD and Spanish National Railways (Renfe). I think that the legal protection on the ICE brand only extends to the brand itself, thus nullifying the approval of DB AG being needed. Secondly, Siemens only has legal claims to parts of the design considering how Chinese joint-ventures work regarding intellectual property. As it stands, Tangshan Railway Vehicles is building the Velaro CN, so there's that.
I understand that for my Dutch friends, seeing the ICE3 drive around with the NS logo would be stellar, but I (personally) would think it's more fun to have another real life high-speed train rather than having to rework it into a fictional ICE-but-not-really-please-don't-sue-DB/Siemens. It's just my two cents.
[I assume Wikimedia images may be directly linked, based on common licence theories?]
This has already been discussed at length and proposed by me earlier in this thread. Also, the ICE 3 mod already exists and can easily be adjusted by you with an NS logo and bistro font rather than the current DB logo, for your own personal use. If you choose to add this repaint to the file base, contact the maker of the original mod first.