I'd like to list some beliefs within Judaism and Christianity that bear a resemblance to older pagan beliefs. The WTS is deceptive when they selectively point out such parallels, but only with respect to beliefs they reject.
For example, the WTS argues that the origin of the concept of the immortal soul is in Egyptian and Babylonian mythology, both of which espoused such a concept.
But they neglect to also point out that Babylonians wrote flood accounts similar to the Noah story before the writing of Genesis, or that baptism was practiced in pagan religions before the birth of Christ.
I've also seen how later biblical conceptions of the Devil as God's adversary seem to mirror what was taught in Zoroastrianism which featured a god of evil in a cosmic struggle against a god of good.
Any other examples?