 Stage 1 would include a multi-purpose concert space, meeting spaces and a 1000-seat ballroom over the railway tracks.Rann said Stage 2, scheduled to be completed by mid 2017, would feature a distinctive high-tech glass "arrow" structure capable of seating 3,500 people.Woods Bagot and Larry Oltmanns of Vx3 Architects.Strategists.Urban Designers were appointed as the design team for the $350 million expansion in February 2011.