Generally, Eddie Brock survives in the comics. However, there have been some complex and alternate storylines where his fate is less certain or temporarily in jeopardy.
They would become even closer. The shared responsibility of having a baby would strengthen their bond. Eddie would be more protective of Venom, and Venom would be more gentle towards Eddie, knowing they are in this together for the sake of their future child.
One common theme is the struggle for control. Eddie has to constantly battle with the Venom symbiote to be in charge. Another theme is redemption. Eddie often starts off as a bit of an outcast or anti - hero and through his experiences with Venom, he tries to find a way to be a better person. And the theme of the symbiotic relationship itself is also very common, exploring how Eddie and Venom depend on each other.
One common theme is redemption. Since Eddie Brock has his own complex past, the OC often plays a role in his journey towards redemption or self - discovery.
One common theme is the struggle between good and evil. Since Eddie Brock has the Venom symbiote which has a dark side, and Peter Parker is the friendly neighborhood Spider - Man, their interactions often revolve around this dichotomy.
The key element is his career as a journalist. It led him to the Life Foundation which was the start of all his troubles. Another key element is the symbiote. Without it, he would just be a regular journalist. Also, his sense of justice and curiosity, which made him keep digging into the Life Foundation's secrets in the first place.
Rather than looking for this kind of fanfic, I would recommend seeking out fanfic that delves into Eddie Brock's relationships with other characters in a more platonic or heroic sense. For example, his relationship with Venom and how they team up to fight evil.