If you read your Wikipedia links correctly (AKA http://en.wikipedia.org/wiki/The_Syr..._Of_The_Koran), you would have read that it is considered generally to have been written in Arabic, but someone holds the thesis (meaning it's not a fact, it's a thesis, big difference) that: "the Qur'an was not originally written exclusively in Arabic but in a mixture with Syriac, the dominant spoken and written language in the Arabian peninsula through the 8th century."
None of the links you provided showed that Arabic would not have been the language of the Qur'an. There is not much doubt that Syrian contributed a lot to the Arabic language as Syrian was the "intellectual" language of the time in the region. But after that, I don't know and unless you provide some solid evidence...