Have we had wedding shenanigans yet?:) If not, knock yourself out. Canon setting or AUs are both fine.

Potential ideas:
- Misunderstanding over one of them being already married
- Putting Newt in a suit
- Best Man Theseus gives an unforgettable speech
- Grindelwald considers he was the matchmaker here and plays wedding planner or crashes the wedding disguised
- Due to a series of unfortunate incidents they end up getting married at the Whistling Pig instead of the posh venue their families had chosen
- Busman's Honeymoon AU - i.e., the wedding described via letters, diaries, society columns in newspapers, MACUSA memos, etc.
- the Creatures have no idea what the fuss is all about but enjoy themselves tremendously
- casefic + wedding - they have to solve the case/save the day AND show up on time before the Registrar/Picquery/whoever marries American wizards