Well, it's actually something I have read sometime ago, but I can't seem to find it anywhere! So either the URL or a new version from any author-anon will be very much appreciated!
It goes like this; Altair and Malik are out in the city, and for some reason(because of Altair, no doubt), Malik is pissed and wanders away and gets caught by the Templars(...this bit's a little blurry, actually). Then he is taken to Robert de Sable and is tortured and....you know. In the process, Robert determines to make Malik submit to him, break him. When de Sable violates him, Malik tries to pretend that it's Altair in front of him. When Altair finally arrives on a rainy day to save Malik, although he's still breathing, it is too late and he dies in Altair's arms.
Robert de Sable/Malik + Altair/Malik
It goes like this; Altair and Malik are out in the city, and for some reason(because of Altair, no doubt), Malik is pissed and wanders away and gets caught by the Templars(...this bit's a little blurry, actually). Then he is taken to Robert de Sable and is tortured and....you know. In the process, Robert determines to make Malik submit to him, break him. When de Sable violates him, Malik tries to pretend that it's Altair in front of him. When Altair finally arrives on a rainy day to save Malik, although he's still breathing, it is too late and he dies in Altair's arms.