Not much really. Plastic Man is a superhero and salt seems an unlikely element to be directly related to him in a comic panel.
It could be that Plastic Man is using his powers to interact with or protect the hot air balloon.
The plastic man comic panel often features exaggerated and flexible poses of the character. The art style might be bold and colorful.
It could be a strange and fictional concept. Maybe the plastic man needs the salt for some special power or to overcome a problem.
The plastic man boat comic panel could have a unique art style, maybe with bold lines and exaggerated expressions. It might also convey a specific mood or tell a part of the story through visual cues and symbols.
It might show Plastic Man transforming into his liquid state or using his liquid form to overcome an obstacle.
Perhaps it's a way to create a funny or unexpected moment in the comic. Maybe there's a magic element involved where the salt has a special effect on the plastic man. Or it could be a dare or a bet gone wrong.
They might have some crossover storylines or interactions within the comic universe. Maybe Plastic Man plays a role in the events of Injustice.
There might be a humorous or symbolic connection. Maybe Iron Man is seen enjoying a donut in a light-hearted scene.
It's hard to say. Aliens in comics could be on a planet rich in minerals and salt could be a valuable resource for them. But it really depends on the specific comic's plot.
I have no idea. They seem completely unrelated to me.