No. As is already the case, it is not possible to combine certain fares on the same OPUS card, to avoid the wrong fare being activated the next time you travel.
However, the ARTM and its partners in the Montréal metropolitan area have embarked on a process to modernize the ticketing system, which will, among other things, end the problem of combining fares. Eventually, by switching to a virtual mobility account, users will be able to purchase a variety of fare products and then choose the appropriate fare for their journey.