It doesn't make business sense, as no one would want to sponsor a stadium that everyone will still call anfield.
Where do Newcastle play? St James park....fuck knows what it's sponsors name is
Sorry but sponsors pay HUGE amounts of cash, even for places that keep all or part of the old un-sponsored name. Examples...
Sports Authority Field at Mile High Stadium
As someone before alluded, everyone had called the Denver Broncos' old stadium Mile High for decades, before sponsors. They still do, but the sponsor is still thrilled to pay BIG money.
Tenant: Denver Broncos
Cost of Naming Rights: 25 years, $150 million
TD Garden
This is the new "Boston Garden" -- the old one was the most famous basketball arena in the world and existed since the 1920s(?). When the new building went up, it was FleetCenter, etc. The new sponsors brought back the Garden name as everyone was still saying "we're going to the Garden tonight" TD Bank is happy to pay BIG to attach itself to the Garden name.
Naming terms: 20 years, $120 million
Exp. Date: 2025
Tenants: Boston Celtics (NBA), Boston Bruins (NHL)
So get ready for Air China Ground at Anfield or something similar, with the sponsor paying a gigantic sum to attach their name to Anfield. (I have no idea of who the sponsor will be, just using an example).