Re: 8 years of no Batman or Bruce Wayne, and NO ONE could pick up the trend?
Yeah for sure. I even say that about certain lines throughout the trilogy. Many people shrug off these lines as nothing, but you dont say "it'll do just fine against cats!" to Bruce Wayne himself..without thinking that the fans might think of Catwoman. You dont make a reference to GIANT ALLIGATORS in sewers in a Batman movie...it's a Killer Croc joke for the fans. Or "cryo-sleep", that's a Mr. Freeze joke.
And you dont have a pit, attached to Ras Al Ghul. It automatically makes you think of the lazarus pit.