I think the wall sounds like a design issue rather than anything major. I think certain structures on the wall will have to be kept, but the majority will be allowed to amended in some way, or even used as a support.
From Wikipedia (The fountain of all knowledge)
In England and Wales, the management of listed buildings is the responsibility of local planning authorities and the Department for Communities and Local Government (i.e., not DCMS, which originally listed the building). There is a general principle that listed buildings are put to 'appropriate and viable use' and recognition that this may involve the re-use and modification of the building. However, listed buildings cannot be modified without first obtaining Listed Building Consent through the relevant local planning authority.
All in all, the wall would certainly be put to good use, but modified in the way that suits the stadium's needs.