In political partnership, Gantz and Sa'ar aim for unity government

If it was another tight race and the left could not form a coalition but with Gantz help Netanyahu could then alone Gantz could come out with the same story as Bennet with Lapid and claim he is doing a deal whereby he goes first in a rotation to avoid another election. Sa’ar cannot do any deals with Netanyahu who hates personally, runs a party whose sole ideology is anybody but Bibi even claims he was once offered a rotation and turned it down . Also if thee was a rotation agreement only Netanyahu and Gantz would get to be PM there is nothing in it for Sa’ar. If Gantz wanted to do a deal with Netanyahu Sa’ar would have no choice but to end the merger with BW which will harm him and Gantz but not Netanyahu so this merger designed to throw Sa’ar a lifeline get him past the threshold will probably backfire on Gantz by making sure he never gets to be PM. Most likely if there are any rotations it will be Netanyahu and Lapid rather than Netanyahu and Gantz.

then I will vote Likud

Saar knew he'd fall in another election. His base saw him as a traitor to the right when he joined the coalition. They are vowing not to vote for him again. So he decided to smooch up to Gantz, who, if he had not done the usual splitting of votes with new parties al the time could have shifted to the centre-right and changed Israeli politics from extremist to more moderate. There's a winner and a loser in this combination. One will bring the other down and my bet is on Saar bringing Gantz down. Nobody among the moderates or the left will vote for a man who supported the closing of shops on shabbat and religious indoctrination in schools.