Not sure, as it seems like the author wants to wrap things up lately? Hopefully Kudou's confession willl give him enough of a boost to actually tell Kazuha.
Although, what's up with this parade of important characters out of nowhere? Is there going to be a murder or something, with this congregation of detectives and the pretty awful relationship between the two "owners" of the pearl? But even then, it's kinda over the top to just solve a murder case. I'm kinda hoping the sudden inclusion of the Nagano detective will lead to Kuroda and the other two Rum suspects, eventually spiralling the story to a BO arc.
Also, I don't believe heiji is even aware of the progress Conan made concerning the BO. Isn't it about time to fill him in about some important details? At least give him enough information so he can finally remember to not utter the word "Kudou" anymore, he's pretty much doing something akin to painting a big red cross on Conan with the words "Your biggest target is here, Black Organisation, please kill me asap". Not a good thing now that both Gin and Rum are looking into business immediately related to Conan, while he actually knows the name of the BO boss ...