Shiromi wrote:Kaito doesn't have a very good knowledge of medicine, unless it's something he has personal experience with (he gives Conan some of his cold medicine - not exactly a difficult medical problem). So, I don't think that he would figure out that Conan's case is extremely unusual. He'd probably just remember vague headlines about adults with child-like bodies and guess that Conan's like that too.
I think it's interesting when it's explored in Fanfic, but I don't think Goushou will ever have Kaito discover who Conan really is. Kaitou KID is just a pet side-character that he brings in when he's tired of Conan.
If Kaito's intervention in Mystery Train merely happened because he couldn't think of a way to maintain the status quo (though everyone in the BO besides Vermouth thinking Shiho/Ai is dead isn't minor—at least for now—in my opinion), then it's most likely not going to happen, and Kaito will just be there to challenge Shinichi/Conan mentally, once in a while (it's been 2 and 1/2 years since the last Kid case, by the way—I think we're due one in 2016).
As for the movies, however...
If the pattern of how often they do movies that are about Kid holds (3, 8, 14, 19—I don't count 10; Movie 10 was not focused on Kid), then Movie 25 (due out in 2021—even if DC somehow is done or will be done by then, MK won't, and the movies certainly won't) will be the next Kid movie. I hope they'll involve the MK characters, and have Shinichi disguise as Kid, after figuring out his identity, but having a reason to keep it hidden. After three movies repeating the plot twist of Movie 3 in different ways, we're due the reverse.
“Life is infinitely stranger than anything which the mind of man could invent. We would not dare to conceive the things which are really mere commonplaces of existence. If we could fly out of that window hand in hand, hover over this great city, gently remove the roofs, and and peep in at the queer things which are going on, the strange coincidences, the plannings, the cross-purposes, the wonderful chains of events, working through generations, and leading to the most outre results, it would make all fiction with its conventionalities and foreseen conclusions most stale and unprofitable.”
“Education never ends... it is a series of lessons, with the greatest for the last.”
― Arthur Conan Doyle, The Complete Adventures of Sherlock Holmes and His Last Bow
"I have decided to stick to love... hate is too great a burden to bear."
— Martin Luther King Jr. (A Testament of Hope: The Essential Writings and Speeches of Martin Luther King, Jr)