No, we are not talking about the Nano there.
We know, from unofficial talks with NXP, that they will release a successor of the i.MX8M Quad sometime next year, likely beginning of next year, which will get the updated silicon process and some other feature upgrades, but it will be downward feature compatible with the i.MX8M Quad - so no regression, only improvements in many ways. We do not yet know how this will be called etc. and even if we knew, we would not be able to share this information (yet).
Cheers
nicole