A staff member dressed as LinaBell waves to visitors at Shanghai Disney Resort.Xinhua/Getty ImagesThe market for pets, sports, and cultural IP are poised for huge growth in Chin, BofA says.With demand outpacing supply in those sectors, greater investment could boost consumption.Weak consumer demand and an ailing property sector have been plaguing China's economy.A family dog, tennis, and Disney Shanghai's LinaBell character have one thing in common — they might end up pulling China out of a long slump in consumer demand.