I just stumbled across this thread and wanted to expand a bit.
In your sentence, "gode" is an adjective. Therefore, it is used about things that are good.
"Superheltene ser gode ud" => "The superheroes look good" (i.e. it looks like they aren't evil)
"Kagerne ser gode ud" => "The cakes look good" (i.e. they look delicious)
If you are referring to looks, you'd say "godt":
- "De ser godt ud"