1.) The voices of the members of Tony Stark’s Iron Legion all belong to James Spader, the voice of Ultron. Over time, their voice goes from being overly robotic to being more Ultron as the master machine takes full control.
3.) Dr. Helen Cho has appeared in Marvel Comics before, but not often. She is the late mother of Amadeus Cho, a teenage super-genius who was friends with Hulk and Hercules.
海伦博士（Dr. Helen Cho）在漫威世界出现过，但出场率不高。她是小神童（朝鲜裔高智商少年）已故的母亲。小神童与绿巨人、大力神海格力斯是好友。
4.) During Stan Lee’s cameo, he is hanging out with actual World War II veterans. Some state that they may have been old war buddies with Steve Rogers.
5.) While at Avengers Tower, the camera pans by a statue erected in New York City. That statue is a tribute to all emergency personnel who were the first responders during the “Battle of New York” in The Avengers.
6.) When Scarlet Witch gives Captain America his flashback vision, the band in the USO dance hall is the Rob Thomas Players. Rob Thomas is the comic book genius who succeeded Stan Lee as the main writer and editor for a number of Marvel comics such as “Avengers.” Thomas is also responsible for creating Ultron and Vision.
7.) Yes, the Hulkbuster armor is nicknamed “Veronica” which is a reference to “Archie” Comics. Veronica was the rival of Betty in those comics, and Hulk actually used to have a love interest named Betty Ross.
8.) During the failed attempts at Bruce Banner and Black Widow trying to be romantic, the song “I Can’t Get Started” plays time and time again. It’s a song that details frustrated attempts to get a romance going.
布鲁斯·班纳好几次都没能和黑寡妇亲热上，每回都会响起歌曲《I Can’t Get Started》。这首歌描述的就是试图恋爱但是挫败连连。
9.) Speaking of romance, when Vision rescues Scarlet Witch from the floating city, they slow down and exchange a deep look. Marvel Comics’ fans may remember that they were a couple and even married at one point.
11.) After Jarvis becomes Vision, Tony Stark implants the new FRIDAY software into his Iron Man armor.
12.) In the comics, Vision is able to intangibly take his hands/arms into the bodies of his enemies and disrupt their heart.
13.) In case you blinked and missed it, Black Widow gets a text at Hawkeye’s newborn and there is the baby’s name written – Nathaniel Pietro Barton. Not only is Nathaniel a male version of Natasha, but Pietro is the name of the fallen Quicksilver, who died saving Hawkeye.