I did some research on the sizes and shapes of relatively modern auditoriums and arenas across Canada
An arena the size and shape of Canada Life Centre in Winnipeg (15k+ seats) would fit on the 44 Gaukel lot plus a little bit of the old bus terminal lot with space for both a decent-sized community centre and a building of restaurants and bars facing the area across a public square.
TBH, that restaurant building is nearly double the depth it needs to be, which would make the public square even larger. I imagine something like Waterloo Public Square, with enough area to fence in patio space for the bars and restaurants. they'd be really popular from Spring to Fall on event afternoons and evenings.
An arena the size and shape of Canada Life Centre in Winnipeg (15k+ seats) would fit on the 44 Gaukel lot plus a little bit of the old bus terminal lot with space for both a decent-sized community centre and a building of restaurants and bars facing the area across a public square.
TBH, that restaurant building is nearly double the depth it needs to be, which would make the public square even larger. I imagine something like Waterloo Public Square, with enough area to fence in patio space for the bars and restaurants. they'd be really popular from Spring to Fall on event afternoons and evenings.