ABC News reported Blaec Lammers, 20, allegedly told police he had already purchased a ticket for tomorrow's screening of the new film at a moive theater in Bolivar, Missouri.
His arrest followed information from his mother who told police her son had purchased 400 rounds of ammunition and two assault rifles "very similar to the ones in Aurora, Colorado, movie theater shooting," according to probable cause statement issued by the Bolivar, Mossuri Police Department.
He was charged on Friday night with first-degree assault, making a terrorist threat and armed criminal action.
"Blaec Lammers stated that he had a lot in common with the people involved in (recent mass shootings). Blaec Lammers stated that he was quiet, kind of a loner, had recently purchased firearms and didn't tell anybody about it, and had homicidal thoughts," according to court documents obtained by CBS News.
The documents also revealed that Lammers told police he bought the weapons earlier last week with the intention of carrying out the massacre on November 18. He had planned to also open fire in a nearby Wal-Mart store because it would give him access to more ammunition, the court documents allege.
According to the Springfield News-Leader, Lammers is being held on $500,000 bond.
Police praised his mother for alerting authorities to her son, who the court was told had been "off his medication" for a mental condition.
"Thankfully we had a responsible family member or we might have had a different outcome," Bolivar Police Chief Steve Hamilton told The Associated Press.
That outcome could have been a repeat of the Aurora mass shooting on July 20, when suspected gunman James Holmes shot at movie goers seeing the new Batman movie. Twelve people died and 58 were injured.