A future for Chrislam?
The concept is likely to be embraced by a few non-fundamentalists on either side of the Christian-Islam divide, such as Universalists, Unitarians -- who make up a tiny fraction of Christianity. There are some Buddhists, Hindus, Bahai, Sikh and Shinto faithful who might be willing to add Christianity and Islam to their belief system -- since some within those faiths reject that there is any single path to God.
But any successful hybrid of Islam and Christianity is unlikely to play well at the Vatican or in Mecca -- much less Nashville or Tehran -- since a merger would require abandoning such key beliefs as that:
Jesus is the only hope of the world or that
Submission to Koranic law alone earns eternity in Paradise.
Islam holds the firm view that eternal damnation awaits those who do not earn salvation by submitting to the requirements of the Koran, which describes Jesus as a noteworthy prophet who didn’t really die on the cross.
Christianity has at its very core that Jesus is the only way to heaven, that we are to turn away from "revelations" such as the Koran that deny that He is the Son of God -- and that eternal salvation cannot be earned, but is God's gift of grace, earned for mankind by Christ’s crucifixion.