During the Sounders Annual Business Meeting, renders of an upcoming Sounders clubhouse were shown on big screens at the Paramount Theatre. The Clubhouse will be located just downstairs from the team's offices in Pioneer Square, and are just off of the March to the Match path. The renders featured an open space, and was talked about as a place for fans to gather, to be a headquarters for Seattle soccer fans. It seems to be being angled as a place to gather for away games and big events, like this year's Open Cup Final or World Cup games.
After the event, I was told that the renders may not yet be ready for wider release than what was shown in the slide show. So take my word for it that this new clubhouse looks like a worthy addition to the Sounders gameday. More information will be shared as we have it.