"No plans" only means "at this time". As we have seen, plans and promises change quickly since this past year. Besides, the establishment will "require" this in whatever way and through whatever channels are most effective. Basically this means applying social and economic pressure. Employers, businesses, schools, local jurisdictions, whatever. If you cannot make a living and buy food and medicine without proof of having received the injections, then they are, in fact, required.

As to which countries are most likely to have mandates or apply the most pressure on their populations to get the injections, I think the western countries will be worst, followed by wherever there is the most influence of the western establishment.