Note. With the following sources:

 
 
 

I have expanded the name section.

Even with the new information about whether SJP has an apostrophe or an extra s, the only way the 'dab page for similar names' idea makes any sense, is if you make every similar name without a target:

 St. James Park
 St James' Park
 St. James' Park
 St James's Park
 Saint James Park
 Saint James' Park
 Saint James's Park

all point to the 'home dab page', St James Park, with outgoing links to the articles:

 St. James's Park (the primary topic, the london park)
 St James' Park, Newcastle
 St James' Park, Bristol (article setion pipe link)
 St James Park, Exeter

I still think this is pretty poor solution, when there are no direct conflicts between the actual article names used. I frankly don't see how it is any better than when the articles had dab hats to cater for people who either mispelled links or mis-spelled in the search box. The only advantage to adding (, Newcastle) to the title is for pre-emptive assistance to user navigation in the search box, so in that case, a redirect variation for London, Newcastle, Exeter needs to be created for all similar names that a user might type into the search box, namely:

 St James Park
 St. James Park
 St James' Park
 St. James' Park
 St James's Park 
 St. James's Park
 Saint James Park
 Saint James' Park
 Saint James's Park

meaning that:

 St James Park, Newcastle
 St. James Park, Newcastle
 St James' Park, Newcastle
 St. James' Park, Newcastle
 St James's Park, Newcastle
 St. James's Park, Newcastle
 Saint James Park, Newcastle
 Saint James' Park, Newcastle
 Saint James's Park, Newcastle

should all redirect to St James' Park, Newcastle as the current name

I will do that now as it seems a good idea anyway, whether this article stays with " ,Newcastle" added to the title or not. 

The disambiguators with (brackets) are against policy, as geographic disambiguation is done by commas to the next highest administrative sub-division, so these should be deleted.

P.S. None of this even addresses what to do with the potential mis-spellings of
 St Jame's Park
 St. Jame's Park