First data on Major tournaments
Information about the upcoming Major tournaments was published on the blog of Dota 2 developers. It states that the championships will be held twice per month. The beginning of the first event is scheduled for November. It will be held in European region. More data about the tickets will be provided later.
Before the main part of the tournament, the qualifiers will be held. The open qualifiers will be conducted on 6-9 October, followed by regional qualifiers on 10-13 October. Any team can participate in open qualifiers. Two best teams of each region will get to the regional qualifiers, the winners of which will go to the Major tournament. The list of the teams, invited to the regional qualifiers and main event will be announced on 5 October.
The stable squad is the main term for a team to get an invite. Valve requires that all the reshuffles of the teams must be finished by 5 September. If a team fails to comply with the terms, its invite will be canceled and it will have to struggle through open qualifiers to get the slot. So we can now surely say that all the new squads will be announced by the teams until early September.