[Yoong]

I have some questions about Super Hero Taisen GP. First of all,if Rider 1 and 2 died and there was no Destron then how did Kazami Shiro lose his family and then get turned into KR V3?All the events leading to how he became V3 would have been different and there is the possibility that there might not even be a V3. In fact he might not have even gotten involved with Destron since Destron would still be Shocker. If Kazami Shiro did still have a run-in with Shocker,there would be no Rider 1 and Rider 2 to perform surgery on him to turn him into V3. Of course, an obvious answer would be just to ignore all logic since the movie wouldn't even get made if the scriptwriters had to analyze every minor detail that would have turned out differently but I just have to be doubly sure just in case one of the people involved did give an explanation.

Secondly, how did Kamen Rider Black end up becoming RX?No sunlight was shone into any split kingstone that he had. He was just "killed" in a way where his kingstone was not affected at all. As usual some logic has to be ignored but I'm also curious if anyone involved did try to explain this in Japanese back in 2015.

I'm not sure if I blinked an eye but also what event made the Great Leader decide to build Kamen Rider 3(not V3) and change the past?Did the movie explain or did I miss something?