Take a look at my site and I bet we have a concept here that anyone can copy, so called VSC which says
Virtual Shipping CompanyWithin a VSC you can even have sub-companies and their are all fictional.
By using this VSC concept and you got some that can make the boats or re-paint the boats for you then you can place your VSC logo (just like mine) on the ship and sail it in Ship Simulator (when the game supports this feature) or get it included with new add-on packs for this game. Then we can avoid conflicts with real ship owners/companies and we get a majority of VSC fleets in the game that makes the difference.
With more VSCs and with multiplayer I suppose that this game will become more rich to play.
Now I sounds like a business man maybe, but Flight Simulator is already using a similar concept called VAC - Virtual Aircraft Companies (or only VA), so you have virtual companies of SAS, KLM...US Air Force etc.
It's up to each VSC owner how he will design his concept and what he want to afford his crew members, like own VSC missions, ships, routes or other stuff (own website maybe). My VSC is just an example that I'm still working on. I'm turning all my new buildings now into VSC ships with my logo and I have a fictional administration on board like Lord Jacky Sacky Macky, Fabina Korporate and all these bosses