Christianity Without the Supernatural Revelation is Gnosticism
If theologians lose their confidence in the Bible as revelation and in most of the tenets of orthodox faith, but they want to stay as "believers", it seems to me that they end up with a kind of pantheistic gnosticism. The "God" they talk about is really a connection with Life - either as a kind of nature mysticism or a type of pantheistic paganism.
They may still use the Biblical words and some traditional theological terms, but in essence they are pantheists with a Christian veneer.
It reminds me of Benjamin Warfield's remark that the truth of the Bible is the bulmark of distinctive Christianity.