And Llewellyn believes the likes of Gethin Jenkins, Rhys Priestland and George North - who all impressed in New Zealand - could well move on to pastures new sooner rather than later.
"George North is a superstar, so he's going to attract real big money from everywhere," said Llewellyn.
"Our academies, which were set up in 2003 with the advent of regionalism, are now starting to produce your Norths and Scott Williamses.
"We are producing really good rugby athletes at 20 to 21 years old and rightly, I guess, they are attracting the attentions of the bigger clubs in Europe.
"We're becoming a little bit of a victim of our little bit of success at the World Cup."