It would be nice if home video was still in demand by then. Do we even have a 'complete' TOS BluRay set yet? I stopped paying attention after I bought the season sets. I think they should have a complete TOS set with the eps all in production order.
I won't lose any sleep if they never get to TNG seasons 6-7 because nobody was buying them. Just give me 1-4 in HD and I'll be happy.