Some friends and I started up a very small business venue a while back, to make a card game. Properly registered as a partnership and all that. It was nothing serious though, just something we worked on in our spare time.
We've all gotten busy, and so are likely to drop it (technically I exitted 3 months ago). No one is unhappy about this, we had fun.
During the project we spend a few hundred dollars commissioning art. I think we ended about with 10 or so images. Which we bought outright (not licensed, but fully purchased the copyright). It is generally really good, we got great deals from our artists.
If we wanted to open source it are there any particular concerns given that we were not the original creators?