One common theme is a race or a competition between the two speedsters. Since both Flash and Quicksilver are known for their super - speed, it's exciting to see them compete in a friendly or not - so - friendly race. Another theme could be them teaming up against a common enemy. They might combine their speed powers to take on a powerful villain.
Fanfiction.net is another option. It has a large collection of fan - created works. However, the tagging system might not be as precise as AO3. But with a bit of digging and using the search bar for 'Flash meets Quicksilver', you may find some interesting fanfictions.
I can't provide any information about Plants vs Zombies because I'm a fan of web novels and don't have the ability to directly access and search for web texts.
One of the best stories is when Flash has to outwit Captain Cold's new ice - based weaponry. Flash uses his super - speed to create heat friction and melt the ice. It shows the classic battle of speed against cold power.
The main characters are Peter and Flash. Peter is often depicted as the underdog, a smart but sometimes shy guy. He might be a bit of an outcast in school. Flash, on the other hand, is usually the popular jock. He's cocky and likes to show off, often picking on Peter. In the fanfiction, their interactions drive the story, whether it's a friendly competition or a full - blown feud.
In certain comic arcs, Quicksilver's fate is that of death. But comic storylines can be complex and sometimes characters come back or alternate realities exist where they are still alive.
One interesting plot could be a competition between Peter and Flash in a science fair. Peter uses his intelligence and some of his spider - powers subtly to create an amazing project, while Flash tries to outdo him with his over - the - top showmanship. Another plot might be a race where Peter, without using his full spider - speed, still manages to keep up with Flash who is the school's track star, leading to Flash being both frustrated and a bit in awe of Peter.
One of the best Quicksilver stories is his appearance in the 'X - Men' comics. He shows off his super - speed in really cool ways, like running circles around his enemies. His cocky attitude also adds a lot to the story.
One idea could be a story where Nightcrawler and Quicksilver team up to stop a powerful villain who is causing chaos in the city. Their different powers would complement each other well. Nightcrawler could use his teleportation to surprise the enemy and Quicksilver could use his super speed to quickly disarm any traps or threats.
I don't know who the author of the 'quicksilver novel' is. There are so many novels out there, and without more specific information, it's hard to determine the author.