A religion based on the Bible wouldn't be very new.
But if we were to design a new religion, I guess the idea would be to figure out what would serve humanity as a whole, instead of the smaller regional societies where most religions were born.
Encourage curiosity and inquiry. Promote learning and education. Encourage critical thinking and use of reason and logic. Promote generosity and the health of the community.
Condemn divisive and demeaning language. Condemn violence. Expect explanations instead of justifications. Discourage fallacious thinking.
I think those are useful as a starting framework.