He would know all the same people he knew before he got married.
He is a fictional character and this is not possible.
cat women, penguin, joker, bane
The Marvel superheros and the villains.
The Joker would not invited.
Most of the rogues' gallery (Riddler, Penguin, Two-Face, etc.), with the Joker probably the least likely of all.
Most people would not get an invention. Inventions are few and far between even among fictional super heroes.
Heath Ledger
Any one of the rogue gallery would not get an invitation, but if you were to choose, highest on that list would be the Joker.
Spiderman
Only Batman knows
Batman's name is Batman. However his secret identity is Bruce Wayne.
He was/is not married. As far as anyone knows but how can you be sure