The chances for that are:
ZERO, none, nada, nil, zip, nada... not gonna happen.
Canon will use their current tech for as long as they can, and will only switch to a 3rd party manufacturer (like Sony, but there are others like Toshiba etc) only if they absolutely have to, if they are so far behind in technology that their sales fall directly as a result of a real, huge uproar and dissatisfaction at specifically their sensors.