Hopefully a balance will be sent to both asset holders and issuers.   At that point, asset holders will need to contact the issuers directly and see what their plans are.  Some will move exchanges and try to re-establish, some with wind-down, some may say "kiss me" and other might do thinks like go pink-sheet.   That will really be up to the issuer, but until people can get a closing balance, it makes that prospect almost impossible with major risk to both parties.