Only if they changed the rules to make ERM II membership mandatory and automatic, or if they changed the Euro convergence criteria to remove the need for it. I've heard no talk they are planning to do so.
The non-Euro EU members have a say in the enlargement negotiation process too, and they don’t want new members to be forced into Euro adoption - it might weaken their own ability to resist that pressure in the future, plus additional non-Euro EU members are a potential source of new internal allies
> They won't become EU members, without a clear will to adopt the policies which lead to the Euro.
The government that negotiates to join the EU may do all they can to convince the EU that they want to join the Euro – they might even really mean it. Then, after accession, that government loses an election and get replaced by a new government which is anti-Euro. What can the EU do to stop that? Nothing.
> an EU member state (present or future) cannot be forced to adopt the Euro
Future members can be forced. They won't become EU members, without a clear will to adopt the policies which lead to the Euro.