I can see the streamer range being completely updated to match(ish) the Uniti design (front facing) and platform. That's a no-brainer. First on the list.
The 272 is then the anomaly, but might take longer - to justify the price positioning, it must be better than just a Nova with the power amp taken out. On which topic, I can see a SuperNova Uniti product arriving too. After all, there was a SuperUniti, and if you call a product Nova then surely … no? Come on, has to be done.
If it were me, I would make the SuperNova a two-box solution: a pre/streamer replacement for the 272, and a matching power amp. Buy them separately, or together.
2017 was the year of getting the Uniti range out of the door (eventually). 2018 is the year of fixing bugs and extending the Uniti platform across the range. Other than maybe updating the Musos, everything else will just be tweaks.