Louise Evans from business advisors Grant Thornton says promotion could be worth up to £150m for the club and will have knock-on benefits for the city and Wales.
More top news
A new service launches in Wales today to get more people involved in dementia research, even if they don't have the condition.
As Welsh-born former Australian PM Julia Gillard speaks at the Senedd on women's rights, we take a look at some important female figures.
Barry-born Julia Gillard is delivering a lecture at the Senedd today, where she will discuss barriers women face in the public sphere.