
Question: How does Splinter know who shredder is? It's established that his first memories are from the lab so that's how he knows Eric Sacks is a bad guy and April saved them, but how does Splinter know Sacks is working for the foot and is connected to shredder? He even knows shredder trained Sacks as a boy, but this was in Japan, 20 to 30 years before Splinter was around.
Answer: Sacks told April that he was raised in Japan by a local sensei, and that he shared the lessons he learnt with her father. Splinter would have overheard Sacks mention his master at the lab, as well as when O'Neil discovered what he was up to with Project Renaissance and his connection to Shredder and the Foot Clan.

Question: When Costner meets Jack Ryan for the first time he calls him John P. Ryan twice instead of Jack. Nowhere else in the movie did I here him referred to as John. Am I missing something? (00:08:15)
Answer: This is true of all versions of the character - his name's officially John Patrick Ryan, but he always goes by Jack.
Answer: In all the original movies he was Jack his sons name was John so I thought he was the son of Jack.

Question: Harry told Dean he had enough information on him to have him locked up for life. What information was this?
Answer: Details aren't given, but it seems that Dean is involved in local crime along with the gang that hangs around with him. Even if Harry is bluffing, and doesn't have specific proof, it is clear that he is abusive and he has the recording of him threatening Eggsy.
Answer: CCTV surveillance and such like. And a possible kingsman informant embedded in the gang leaking incriminating info. Or police informer who reports to kingsman. Or, y'know, he was lying.

Question: In the real world, during the "Let's put It All Back" sequence, the son's creations are set up fighting Micro Managers. When the dad is rearranging everything, he never seems to do anything with them. If they weren't part of the Lego displays he built, why didn't he change them?
Answer: Either they were part of another set (which since in Finn's imagination they're owned by Lord Business so them being part of another set could be possible) or he just didn't get round to them. We only see him destroy some creations, not all.

Question: The lone woman on the bridge. What was she saying?
Answer: She was listing some of the things that naturally kill people in the world, such as diseases and natural disasters, and said that this was her time to kill people, because the Founding Fathers gave her the right to Purge.

Question: Why was Preston a private and not an officer like the rest?
Answer: Preston was loosely based on the real-life Lincoln Kirstein. Prior to WWII, he was a noted writer and an influential person in the cultural arts in America. When the war broke out, he enlisted in the army with the rank of private. He eventually joined the Army's Monuments, Fine Arts, and Archives unit, later known as the Monuments Men. He was selected for his abilities, regardless of his military rank. The movie reflected that.
Answer: Gordo was making a point to Norman that the crew of the "Fury" had seen some horrible things during the Battle of the Falaise Pocket. After wiping out an entire German army there, they were tasked with putting wounded horses out of their misery. The point was that Norman was not there, and did not experience what they had, so Norman could not judge the tank crew's actions.
Scott215
Gordo brought up the horse thing because him and the other (original) crew members were not happy with Don and Norman enjoying a nice, quiet meal without them. He even say's "You weren't there" meaning Don sharing this with Norman when he hadn't yet been through much war time like all of them had, together. They also say "We weren't invited", "Why weren't we invited." The horse story was to get at Don for not inviting them and sharing it only with Norman.