Well, in the 40k tyranids short story, the Tyranids are presented as a force of nature. Their appearance is often grotesque and menacing. The stories might also explore how other races in the 40k universe react to the Tyranid threat. Some may choose to fight head - on, while others might try to find more strategic ways to deal with this ever - growing menace.
The themes in the 40k tyranids short story include the power of the swarm. The Tyranids operate in huge numbers, and this mass - action is a significant aspect. Also, there is the theme of the unknown. Since they come from outside the known galaxy, their true origin and full capabilities remain somewhat of a mystery in the stories.
Perhaps a plot where the Tyranids are actually from a parallel dimension that is starting to merge with the Star Wars galaxy. This would bring in elements of interdimensional travel and the characters would have to figure out how to close the rift while also dealing with the Tyranids that are pouring through. It could also lead to some interesting team - ups, like Jedi and bounty hunters working together to stop this invasion from another realm.
The Tyranids could be incorporated into a Star Wars fanfic as a bio - engineered weapon gone wrong. Imagine some mad scientist in the Star Wars universe trying to create a powerful new life form for warfare, but it gets out of control and turns into something like the Tyranids. This would add an interesting layer of mystery and danger, as the characters in the fanfic would have to figure out how to stop this new, ravenous threat that is rapidly spreading across the galaxy.
Common symbols in editorial cartooning include simple shapes like stars for success or hearts for love. Also, caricatures of famous people or well-known objects can be used as symbols to convey specific messages.
It could be that the theme is centered around courage and the idea that danger is not something to be feared but overcome. The cartoon might inspire viewers to be brave in the face of difficulties.