STM has released some times ago their new and improved low power STM32 chips in the STM32U5 series. Would it be possible to get the flagship available as a micromod / on some SF boards? 
I can essentially only elucidate that it is a possibility; we incorporate many of their chips into our products and those might be seen soon as well (subject to market conditions)
Would be really great . Having these as a micromod processor for example would be extremely convenient .