Defo mate (steam username - lobovski ) is this going to be a 3's tournament or 2's (maybe both) and what process would it be for making up teams?
It all depends on the interest and how much time people have. If you want to have a small tournament of 8 teams then all you need is 16 players whereas the number goes up to 24 for 3s. Then those 24 players have to find time to play, the more people involved the harder it is to organise stuff, one of the leagues we ran we had 2 groups with 8 teams in each group and with nearly 50 players there were quite a few dropout teams mid-season.
At this point it's just an idea, if it looks like there is interest, which it looks like there is then we can start discussing details and throwing out ideas, maybe taking a few polls to see what the availability of people is and what gamemodes they would be interested in.