Barry may face the challenge of controlling the baby's speed powers. Since the baby is a speedster, it might accidentally use its powers in a dangerous way, like running into walls or causing chaos in the city. Also, he has to figure out how to feed and take care of a super - powered infant, which is no easy feat as normal baby - care methods may not work.
Maybe in the fanfiction, Flash discovers Peter's identity in a very unexpected way, such as seeing Peter's Spider - Man suit by accident. He then has to decide whether to keep the secret or not. He might struggle with his own jealousy towards Peter and the newfound knowledge. If he decides to keep it a secret, it could lead to an unlikely friendship between them, with Flash helping Peter in small ways without Peter knowing it's him.
The survival of their friendship is uncertain. Oliver has a lot of pride and Barry is his friend. Finding out about the kiss could shatter Oliver's view of Barry. However, if they both value their friendship more than their feelings for Felicity, they could work through it. They might have to go through a period of awkwardness and rebuilding trust, but it's possible for their friendship to survive.
Barry's relationship with his enemies could become more complicated. Some enemies might see the baby as a weakness and target it, while others might be intrigued by the idea of a baby speedster and try to manipulate the situation. This would put Barry in a difficult position, having to protect the baby while also dealing with his foes, and it would impact how he interacts with them.
Well, it's hard to say for sure. Both Reverse Flash and Flash have their unique powers and strategies. It often comes down to how well they use their abilities and the context of the encounter.
There are many great authors in this area. One popular one might be someone who goes by the name 'FlashFan123'. Their works often have really in - depth characterizations of Barry and Caitlin.
Well, Oliver might get really angry at Barry. He could see it as a betrayal since Felicity was someone he had feelings for. He might confront Barry and demand an explanation.
The Time Trapper would be a great antagonist. He has his own powerful time - related abilities and goals. If he and the Reverse Flash cross paths, they could be in a struggle for control over time itself. Since the Reverse Flash is used to being the one causing chaos with time, having the Time Trapper oppose him would create a lot of interesting power struggles.