I am sure any changes to bling will be gradual. When the Crown and Cipher were changed when Elizabeth II was crowned, did all the bling change overnight? I am guessing not.
The only reason there is a separate cipher for Scotland is because there is an actual physical Crown of Scotland dating back to the Stuarts, the Scottish kings that became English kings as well.
If we (Canada) want our own crown, we’ll have to make one. Knowing Canada, it will be an insanely expensive atrocity of mediocrity designed by a committee with representatives of each province, language, ethnicity, and gender.