Both the ONTC and government have been coy about a Timmins-Cochrane connection,, but the ONR's Northlander project page reads:
The business case discusses an option of a 'shuttle' between Timmins and Cochrane, but they've not tendered for any equipment so would would have to do it with existing PBX equipment and crews, which seems unwieldy. I don't get the sense (although its not absolutely clear) that the new Timmins station will have provisions for turn-around maintenance, hotel power, etc. and it would mean a new operating base for both running crews and light maintenance staff. That's why I'm hanging my hat on the trainset connecting Timmins and Cochrane; turn a maintenance move into a revenue move.
Besides, if service is still slated to start mid-2026, I don't see the Timmins station finished by then.