Have I gone too far or am I all right?

I've been looking up copyright infringement on www.copyright.gov, but they aren't really clear.

I've used references on a work I've been writing, but I'm wondering if I can be sued.

You're allowed to use small notes and whatnot, but the information wasn't to clear.

Here's what I've used.

Reference: A Comic book Character named Spawn

“A old-world character named Spawn from the nineteen-nineties. It seems he’s had a revival of late.”

Reference: King Kong

“Oh my god, Kong!”

Reference: The Marines

Faction

Reference: The Vatican

Faction

Can you make reference of the Pope?

Reference: Spain

Faction

Reference: The Nazis

Terrorists

Reference: The Bible

Quotes and character references

Reference: Artwork

“You know, I’ve never seen The Last Supper before.”

Reference: Shakespeare

There is this whole seen where two characters have secret meeting in an acting theater and Romeo and Juliet is playing.

Reference: Geographical Areas

There is use of actual cities and geographical locations.

I do have a disclaimer... I wonder if it's appropriate...

Disclaimer:

Some material may not be suitable for those who are over reactive to fictional situations. In this sense, I offer this disclaimer. This disclaimer is a notice that by continuing in the tale, I cannot be held responsible for any believed harm.

This story will include:

Descriptions of violence, blood, and gore.

Suggestive themes.

Negative References (Alcohol, tobacco, drugs, ect.).

Taboo subjects.

Language (strong, mild, foul, ect.).

Special developments for this writing (Language, terms, culture, ect.).

Scientific theories and facts (Mutation, evolution, chemistry, ect.).

Religious theories and/or individual beliefs (Christianity, Bakirism, Atheism, ect.).

Bias views projected by the characters (Race, nationality, religion, ect.).

This story may include:

Mischief (comic, childish, mature, dark, ect.).

Humor (comic, childish, mature, dark, ect.).

Quotes.

Gambling.

References of Fear.

Sexual suggestions.

Positive groups portrayed negatively, or negative groups portrayed positively.

Controversial issues (Stem cells, biological weapons, suicide, ect.).

Dialects and/or languages that may not be understood or identified.

And of course all things that, for some reason, are found offensive in the story that are not listed above.

Note:

All views expressed in this novel are the opinions of the fictional characters.

Any resemblance to persons or events, actual or not, is merely coincidental.

All historical names and events employed are not held to actual account.

Ect.= Etcetera

I think that about covers it.