With the 4th Division withdrawing from the East Syria (Homs/Deir ez-Zor) and taking a position in the Aleppo area and Syrian Airforce dropping leaflets, we can expect a major offensive aimed at taking control over the areas controlled by the rebels.
Looking at the recent bombardments by the Syrian and Russian airforce and artillery, I expect that attack on Idlib starts from four directions. From the South:
And from the North:
The movement of troops and the directions of the attacks will change depending on the progress made and the resistance the Syrian army encounters. I wouldn't be surprised that in a case of a collapse of the rebel forces a direct push towards Idlib is made by the forces attacking from either the South or the North.