Actually in the past I've done this with a few people and actually have seen it through. I can name a few people I've wound up meeting.
You could always have a Shinobi Legends Panel or Shinobi Legends meet up at a convention whether it be comic, anime, or otherwise.
If you mean like we solely have our own convention you can run into a lot of issues with costs. Renting a room is one thing but that is still significant when it comes down to it. I met a ton of people from here at Otakon(Located yearly in Baltimore, MD) and we had a meet 'n greet as well shared a ton of great times at the convention. Probably one of the greatest experiences I've ever had.