I don't think the likes of Becker or Worrall would make a huge difference, I think there might be a handful of Wolves fans that will attend PB regularly.
Someone like Lindgren though would be a game changer, that would probably give Birmingham the best chance of attracting Wolves fans (albeit the team overall will have to be decent, otherwise interest will wain quickly)
I'd certainly do a few at PB if he signs whereas it would be 1 or 2 otherwise