Love the idea and will most likely participate but given that the voting is pretty much split 50/50 for solo or self made teams, I think the format should be as prior tournaments where you have the option to make your own team (with the donor restrictions) but also have the option to sign up on a thread if you are solo to be put with others.
Would not want to be forced into a team with people I don't know.
I agree with @Foundational and I believe a combination of both is best. For those who would like to create their own teams do so, and for those who would choose otherwise be put together and divided up among the staff with donor ranks adjusted accordingly.
Thank you everyone for participating in the poll! We are actually going to be announcing the date later, not today (because we have an awesome SURPRISE for you!). There will be a post soon with all details of the event.