So this was the origin story for Madame Webb - who she is and how she came to be (as per Batman story no 6)
So we only get to see Cassandra become Md W right at the end, with her powers, how she ended up we see the 3 versions of Spider woman, who will become SW, and a quick future flash of them in costume this sets up things for solo SW movies or series which of course will never happen - like Sacsha Calles version of Supergirl introduced in Flash
So all the potential here for Jennifer Carpenter to get her own Spiderwoman movie was never going to be realised - keeping in mind she is the second Spiderwoman after Jessica Drew, the second Arachne, and then becomes the second Madame Webb as well
Same goes for the other two versions - Anya as Arana and then Spider Girl - and Mattie as Spider woman, keeping in mind her appearances in Jessica Jones, so a crossover option there - whether they would have had some "trio" film, their own stories, or this being a Madame Webb 2 where they actually go out and do something with it
and this "waste" was planned from the start .