The opposition is very broad, but the right wing of the coalition (which is the dominant faction and the one supplying the prospective PM) is barely distinguishable from the Netanyahu platform of genocide, genocide and more genocide. Eisenkot won't even take a public position on West Bank settlements, so I very much doubt he'd agree to make the kind of concessions that would get Arabs to govern with him, first because he's a fascist Zionist and second because his coalition would fall apart if he did. It's much more likely for rogue rightwing parties to leave the opposition and enter the Netanyahu bloc to give them a majority.