[Tom4784]

Originally Posted by Niamh.

It wasn't those things for me, it was the fact that Jon and co have planned to travel to the wall, capture a walker and bring it to Cersei all before the Walkers can even get as far as the wall

I think it's only been implied that they're going to the wall isn't it? They still can't get past it. It'd make sense if they are marching towards something to bypass the wall rather than the wall itself.