So if i don't want to join a team, I can just stand in for teams as and when I want?
Most likely there will be a maximum number of different teams you'd be allowed to stand-in for. Something like 2 different teams max. or something.
Just to avoid people playing for every team once over the course of the tournament.
Besides, it's less about when you want and more about if the teams need you.
The idea is to keep the teams full for every match day, avoiding delays in the process. Tho we will be pretty harsh on that - if you can't field at least 3 people or you don't show = match lost by default - as an example for the process. No discussion. The rules will be clear and strict.
And it would allow people with very little gaming time who can't take part in a team to at least play a match or two as stand-in and still participate.
We still have to figure out if they can take part of the prize as stand-in.