It has been my experience that negotiations and such between publishers and software seem to move at a rather glacial pace. I do believe they have the 12 volume commentary under contract but I am not sure if anyone is yet working on it. Inquiring about cross grades is something that usually happens when a company abandons their own platform in favour of a new one. Since Abingdon has allowed Olivetree, Accordance and now Logos to distribute NIB titles (although OT is missing the 12 Volume set and Logos is currently only working on the Dictionary to the best of my knowledge, even Accordance will not have a complete set since it has yet to announce whether it has the Study Bible coming). So from my point of view anyway it doesn't appear Abingdon has a favoured successor and therefore has no logical reason to offer upgrades. Upgrades means they take in less money, and while a gracious thing to do, I do not see it benefiting themselves in any way, which likely means we will not see one. Although I hope I am wrong.
PS:Even Tyndale only allowed a most minor discount (20% i think) for those of us who had Life Application Bibles with Olivetree when they reintroduced it.