Yes......a good possibility you will no longer see the Ocean turning on the 'Loop Track' at the Halifax Container Terminal that it currently uses.
There is a Wye at Truro where the train could be turned but it would have to run backwards for 65 miles either before completing the run to Halifax or after departure the next day. The locomotives could run-around and lead the train.....but the cars would be backwards including the 'Park Car' directly behind the locomotives.
At one time.....the Ocean could be turned on the Wye at Windsor Junction (jct with the Dominion Atlantic Railway)...about 15 miles from Halifax but the connection has been removed.
Or the configuration of the consist might change depending on what cars are to be used. The Renaissance Coaches face forward only....but Ren Sleepers, Diners and Service/Lounges are bi-directional with half the seats already fixed one-way or the other.
Seats in Budd Coaches can be rotated and I guess a Budd Diner could run backwards but you would have the 'Cabins for One' (old style Roomette) in the Budd Sleepers running backwards. There is a Turntable at CN's Fairview Engine Terminal where the Park Car could be turned but probably cost prohibitive to get one car out there and back to the VIA Station......and how receptive would CN be? Or just replace the Park with a Skyline Dome. When the Atlantic Limited ran across Maine (the CP version not VIA's) the Skyline had flip-over seats as the car was not turned in Saint John
VIA could also just decide to terminate the Ocean in Moncton where a Wye is available.....and passengers take a connecting Intercity Train to or from Halifax. VIA has proposed starting an Intercity service in the Maritimes for several years now and it would run more frequent than the tri-weekly Ocean.
Perhaps this might be the best option. The Ocean is busiest west of Moncton especially in the sleepers....and this would give the coach passengers out of Halifax additional service.
I ride the Ocean often but don't see having to connect in Moncton to a sleeper a big issue and in fact I also ride coach occasionally to Amherst and Moncton.....and having additional frequencies is a plus.
Anyway....several options so could be interesting come November!