I honestly think Kang would have been a much better villain used here. Especially since Kang is descended from the Richards. It would have created a very interesting conundrum in that Kang can’t kill Reed, Sue or Franklin without killing himself, and Reed figuring it out towards the end of the movie and using that to defeat him. It would still have set up the “Kang will return” aspect of it, without leap of Antman having taken down one of the smartest people alive.

Edit: Miss remembered the family lineage, they are related, but not direct.(It seems to flip flop around) So he could still kill them. I still think he would have been better used here for the family aspects.