Considering the Automotive News source and understanding that Lentz is first and foremost a finance guy, the speculation may hold up.
It's also been said by other Toyota execs that going forward, cars and crossovers will be built on TNGA platforms. That's a problem for Subaru that most likely wouldn't be allowed to retool for TNGA and isn't profitable enough to consider it anyway.
https://pressroom.toyota.com/tnga/
Besides, the TNGA C segment platform may not be able to accommodate a boxer engine and hybrid power unit. Toyota said that most of their cars will have HSD power units within a few years.
If the speculation is accurate, there could be massive incentives by the middle of next year to clear out the remaining '19 MY 86's. More speculation, but there could be some deals available on the TRD's especially, there are more of them within 200 miles of me than any other 86 model according to CarGurus.