Al-hilal has won 1 trophy from the Saudi Super Cup. And in the SPL it is certain that he will win the title and lift the trophy.
For me, Al Hilal already won 2 trophies. They won Saudi Super Cup dan Saudi Pro League.
Even if the season isn't over yet, Al Hilal already won it because no team has the ability to catch them. The competition of SPL title is over, Al Hilal is the winner.
And it seems that in the Saudi Arabian King's Cup, Al-hilal will indeed be the favorites to win the title. And there is still one more trophy that Al-hilal has the potential to win. Namely in the LCA or AFC Champions League.
If there is no change in Al Ittihad performance, Al Hilal probably will face Al Nassr in the final of Saudi King Cup. When Al Hilal vs Al Nassr, in theory Al Hilal probably wins the final. However, Al Nassr isn't a weak team, they are even stronger than Al Ittihad. I think there is still a chance of Al Nassr to beat Al Hilal in Saudi King Cup.
In AFC Champions league, I also believe Al Hilal will be the champion. Although other teams may surprise us, but I think it is just a small chance.
So I estimate that Al-hilal will even get 4 trophies this season. Because their performance is still the best to date. And they can still maintain their unbeaten record in all competitions. And maybe it will last until the end of this season. Al-hilal are really at their best this season.
Al Hilal will win 3 titles at least, but it depends on how they can keep their good performance. They already won 2 titles, AFC title may be the next title to win. And if they are lucky, they also can win Saudi King Cup. So, it may be like your guess, they may win 4 titles.