Thank you for this.  May I suggest a three pronged interdependent project: sacred space, civility and discernment
It seems to me that we are so preoccupied with what we think "Christ-ianity" is that we neglect what underlies our religion and out of which it emerges. I don't think that any "denomination" has not "bought in" to the belief that a) we are (somehow) created in the image and likeness of God and, b) that we are made to know, love, and serve God and be happy with....".
So, starting with "sacred space" let's have one year where specific churches buy into BEING sacred spaces of listening, sharing and discussing. Of course debate, but respecting good faith in the offering. Secondly, civility, though related is the constant acknowledgment within sacred space that we are mutually dependent, in relationship as human and as in Jesus. We treat each other as the "Big Threesome" does.
Thirdly, we get some serious help in coming to understand, appreciate, practice discernment.