This is pure speculation... but my money is that they get crushed, shredded, and recycled for scrap. The logistics of fixing each vehicle, coupled with repairing other exiting issues, accounting for various vehicle conditions/damage, and the risk of warrantying each of modified emissions system would likely way outweigh the money recovered by reselling them (at least in the US/Canada/EU). There is probably also a team of tax lawyers working on ways to write off whatever they can, which further tips the scales towards scrapping them.
There may be some portion (<2yrs old, <30k miles) that may be certifiable as pre-owned for resale, but I'm 99% certain that our old '09 JSW is on it's way to the crusher.