Swagger vs Goldust actually hasn't had any build up. They did the arm breaking angle back in October and have spent the last nearly 4 months of having Goldust occasionally feud with Sammy Guevara and not even mention Swagger until this past show.
That post-match segment in Texas a couple weeks ago was simple, but effective and made me want to see it.
Obviously Cody vs MJF buildup has been great, best storyline of 2020 easy.