If there's no full scale crusade to throw the Ottomans off the Balkans, then the best scenario for Skanderberg is that he unites some minor Albanian fiefs and makes a kingdom that lasts for a couple of decades. There's no way the albanian kingdom can survive in the Ottoman Balkans. Nevertheless, in such an occasion, Skanderberg's heritage would be much stronger, so Albanians might convert to Islam at a lesser scale, and the Albanian nationalism might rise earlier, probably at the same time with the Greek, which means that the 19th century in the Balkans can be even more interesting...