Eventually, that is the plan. It is like how the SRT was lumped in with the B-D, and so operators - were they trained on both - could operate on either.
But right now, the only operators trained on either are trained on the Eglinton line, so they will operate there first. The last set of classes will start on March 31st, and those operators may be trained on both lines but will certainly be trained on Finch West at the least.
And only once they are trained - along with everyone else at the TTC who needs specific training for the line - can the TTC begin their simulated service on that line.
Dan