Thanks for your reply.
I suppose you can add more side missions and possibly another campaign in the future as DLC, along with more cards and decks too.
As far as community involvement with game events, why not have a competition for player submitted ideas, these could be limited to, two lines (like elevator pitch short) and you could pick the best 10 or 15 or something and implement them in the future. You could take this idea for side missions too, this would be fun for the community to be involved and also perhaps some ideas will come to light you would of never thought of since you are a one man band. Anyway just some ideas.