Liverpool FC already has a domestic partnership with Vauxhall/GM so one would imagine that the MG tie-in would be exactly like the Cumberbatch adverts and only cover the Chinese market. So sadly we won't see an ad with Klopp, Henderson et al driving to a pizza restaurant in a GS any time soon.
A shirt sponsorship deal with a premiership club may be a shrewd direction for MG to take their advertising in, however. It would increase awareness in the UK market and also feed into the Britishness MG are trying to put into their image in China. It's also worth pointing out that the four largest football clubs in the West Midlands area where MG are based have all recently been bought out by Chinese businessmen though with the exception of West Bromich Albion they are all Championship rather than Premier League clubs for the moment.