Question: Maybe I missed it but is there a particular reason why Christian won't let Ana touch him?
Answer: Because he's extremely neurotic and is unable to have intimate relationships with women other than purely sexual ones. He also did not want to be touched in the area where he'd been physically scarred by his birth mother's abusive boyfriend.
That was her pimp/client, not her boyfriend. She was a prostitute.
Question: As a non-native English speaker, I ask: At the dinner, Jim says to his boss, "I was thinking, with the numbers so high, maybe it's time I get off the road and take an office position." What occupation did he have? And what does he mean "get off the road" here?
Chosen answer: I don't know what his specific occupation was, but the term to "get off the road" would refer to someone who constantly travels, either domestically or internationally, for their job, but they now want to work in their company office every day. The most common trope would be the "traveling salesperson" who was constantly "on the road," going town to town, selling their product.
Question: Do we know that Michael is dead for sure? It seems way too abrupt, against character and anti-climactic for him to have died in the manner alluded to in the film. Or should we assume that not seeing his corpse or hearing 100% confirmation of his death means he might still be alive?
Chosen answer: Selena herself said, that Michael was dead. The actor who played him really didn't want to return to the role.
Question: If she can destroy Ares with her hands then why does she even need a sword and shield? Perhaps for merchandise?
Answer: For the majority of the movie, Diana believes the sword to be the only weapon capable of killing Ares. She doesn't realise until she fights him that the sword is just an ordinary weapon and thus, useless against a god. She carries the shield because it is useful. She uses it in combat most prominently to block gunfire.
Answer: A lot of movies will put a title card at the end of the film before the credits. It's usually to cap off the movie so that it's the last thing you see or think about when you leave (especially back in the day when you didn't sit around to watch for an extra scene). They want it to be redundant so you don't forget (repetition is the key to learning). Most movies (if not all) also have the movie's name at the very end of all the credits too. But I assume for copyright or other legal reasons, the same way a book publisher might print the book's title on every page of the book.
Bishop73