I'm actually working on something you might be interested in. It's not a tournament, but it would be a great place to either kick one off or do the finale of one. It's also based in NYC, where your org is. Me and a few other managers(There are like 5 orgs involved in some capacity already) are going to try and organize a kind of 'International Fight Week' combined with Japanese NYE show event in NYC for this summer(I'm still debating on the name). There's a bunch of stuff I don't want to give away in the forums just yet, as I JUST started planning this like 2 days ago, but there will be a large focus on cross-org fights, big stadiums, and kind of making it a week long event. It will involve all types of businesses, also. Really, just something to drive involvement and hopefully make the game feel a little more 'alive'.
Just something to keep in mind if you'd like to try and do something that coincides time-wise and can be a part of it.