From what I understand, Marineland is the one facility where breeding takes place. In Ontario, in 2015, the legislature made amendments to their animal welfare legislation that specifically prohibited the breeding of orcas, which is one type of whale. They put in place a number of other regulations setting out standards of care for other marine mammals, including cetaceans.
So, yes, if Bill S-203 does not pass, there will be a ban. There is a ban already in Ontario with respect to the breeding of orcas but not other whales.