If they play up the fact that Punk takes strays (Mercury, Serena, Gallows, and Nexus) when their outside bounds are at the weakest, Natalya fits. The Dynasty came apart at its seems, the person she thought was her friend turned on her, and sooner or later Beth will want what she has. Natalya is just the wayward soul that Punk's character tends to pray on. Plus she has a title and posesses a look that is different from the other divas already. I think you could easily right her into that Serena role next to Punk and let Kong go to SD.