development questions

Hey guys and gals,

I am a board game enthusiast and have been for many years. Since childhood I designed my own games for fun mostly card and board games, but three years ago I came up with an idea that honestly has just been getting better and better over the years and has reached an incredible amount of potential. It is a tabletop game system that applies to an obscene amount of genres and could seriously move from board games into video games and other formats. The more I think about this the more applications I find. So far I have developed 2 board games using this system and they run incredibly well and recently I have been thinking about the future of the system. I want to either put it out into the world and see what happens or take it to a development company and pitch the idea. My biggest dilemma is I want to trademark the system if that's even possible or need insight as to if that is a good idea or even necessary. I'm at a point were I feel I need to push this idea. I just have no idea we're to start. Anyone with any experience in any form of professional game development, any advice you guys have would be helpful.