First off, if you’re pulling the “1/2” story card...you realize then considering this is a serialized shared universe telling the same broad overarching story, IW then is part 18 with A4 being part 19 of you think about it like that. IW is a complete story or chapter as much as TWS or Avengers 1 And so forth and nobody said about those “oh they’re only one chapter.” I mean come on.
And second, is this pulling another card the ole “those movies are all the same!” meme? Have a double feature of Black Panther and Thor Ragnarok and tell me those movies are duplicates.