The derivative work doesn't need to generate a profit to impact the market. As I understand it, judges (not that a judge would ever see it, of course) side with the original creators pretty often.
And I think Chris would have a better case because he's a small time comic artist, trying to support himself with his patreon money.
Edit: Like, I think the big argument is whether or not fanart exploits Sonichu or instead brings new attention to Sonichu.
The anti-Chris argument in that case would be "my fan comic is ironic, people will want to read the original Sonichu to learn more." (ie it's not negatively affecting the market value of the original)
The pro-Chris argument is that Sonichu looks like crap, and redoing the Sonichu plot in a new comic is literally just lifting Chris' work, making it look pretty, and leaving the original comic in the dust. That would severely affect the market value.
Now, we all know that Sonichu is crap in any form and this isn't affecting the market value. But I think the pro-Chris argument is easier to persuade a normal, non-autistic judge of.