The recent marvel movies have not been completely accurate to the comics. Although I understand the creative license that Marvel productions took with the original stories, I wanted to try and give some comic background to people who have only seen the movies.

The main points that I will be focusing on are the creation of Ultron, Vision, and the story of Hank Pym.

First, Dr. Hank Pym was one of the most brilliant minds on the planet, on par with Mr. Fantastic (AKA Reid Richards) and Iron Man (AKA Tony Stark). Hank Pym's "powers" are not natural, but instead come from a rare group of subatomic particles he found and called "Pym Particles". He discovered that when ingested, the particles can alter the size of matter allowing him to shrink and grow.

He also created a helmet that allowed him to talk to and control ants. He also shared this technology with his future wife ,Janet Van Dyne, who adopted the persona Wasp.

Both were among the original members of the Avengers. Most of this, however, was in the recent Ant Man movie (except for his and Janet's part in the Avengers).

What was not metioned, however, was that Pym also took on the persona Giant Man when he became tired of being a "small superhero". He now able to grow to extraordinary heights, but soon the strain became too hard on his body and he quit the Avengers.

Soon, however, Janet was kidnapped my Altuma, and then by the Collector. When Pym dsicovered this, he reluctantly re-joined the Avengers and changed his name and costume to Goliath.

Soon after, while experimenting with unknown gasses, Hank Pym lost all his memories and assumed the identity of Yellowjacket, and claimed that he had killed Hank Pym. Though his memories weren't there, Yellowjacket continued to fight with the avengers and eventually married Janet, although they later got divorced due to Yellowjackets bad temper.

Despite all this, Hank is most well known for using his genius to create Ultron.

In the comics, Ultron was created by Hank Pym, NOT Iron man.

Created as a robtic servant, Pym programmed Ultron with his own brain patterns.

This was probably not the best idea because Ultron rebelled almost immediately and escaped to plot the end of humanity. By giving himself some measurable upgrades, Ultron became one of the Avengers' most feared enemies.

One of Ultrons most devious schemes was his creation of Vision. In the comics, Ultron purposefully created an artificial intelligence capable of fooling the Avengers into trusting him. Unbeknownst even to Vision himself, Ultron programed Vision to lead the Avengers into a trap and ultimately betray them.

Vision, however, was convinced by the Avengers to turn against his creator.

In the movies, Tony Stark programmed Ultron and Vision (because Vision was ultimately Jarvis in the end) and Hank Pym was written out of the story entirely.

Comment with any thoughts about the topic and remember that if you want to hear about something specific then comment!