Is a true Islam reformation possible? The question is looked at here where Robert Spencer gives his reasons for skepticism.
From comments: by Walter Sieruk. On the topic of a reformation within Islam, a very different yet possible valid and true view on this has been explain by the Christian, Nabeel Qureshi, who was in the past was a Muslim .He wrote in his book which is entitled ANSWERING JIHAD wrote about the suggestion “that Islam needs a reformation .What they may not realize is that radical Islam is the Islamic reformation. This might sound shocking, but consider: Just as the Protestant Reformation was an attempt to raze centuries of Catholic tradition and return to the canonical text, so radical Islam is an attempt to raze centuries of traditions of various schools of Islamic thought and return to the canonical text of the Quran and Muhammad’s life. This desire to return to the original form of Islam can be seen not only in the words of Sayyid Qutb, but also in his method. He focused almost entirely on references to the Quran. It is true also of the Muslim Brotherhood and ISIS today, whose publications and proclamations are punctuated by references to the Quran and hadith literature. Radical Muslim organizations are explicit in their aim to reform Islam.”