Often, in Marvel Comics crosswords, you might encounter characters such as Doctor Strange, Guardians of the Galaxy members like Star-Lord, or classic heroes like Captain Marvel. Their names are recognizable and make for common crossword entries.
Some common ones could be Spider-Man, Iron Man, and Captain America. They're popular and often show up.
Well, you'll frequently find characters like Thor, Hulk, and Black Widow in Marvel Comics crosswords. These are well-known and beloved figures that are familiar to many fans.