I'm not a lawyer. However, I am a writer and a producer so I have
worked with entertainment an IP lawyers often. I know you are
not asking for definitive legal advice here – just an informed opinion.
It is legal for a character in a movie to say a name. A business
name, the name of a fictional character, the name of a building, a
street name. “They” cannot sue anyone – the writer or the prodCo
or the distributor. Ir is helpful to understand the difference between
libel, slander and copyright/trademark infringement. A character in
a movie saying “I see why it's called Legoland” when pointing at the
MI6 building is not in violation any of those things. A character in a
scene saying, “Perhaps you should visit him.” “I'll pop by Legoland
this afternoon.” does not reach the level of slander, libel or
copyright/trademark infringement.