I think it will be about more than wages - i think RVP will want to see Fabregas and Nasri properly replaced AND some the players who are not good enough moved away from the first team.
I really doubt if Wenger or Gazidis or the board will ever allow a player this kind of bargaining - "replace this one, move away that one, buy two world class... and then I will sign"
Regardless of how big a player is it would be a huge, huge mistake for any club to allow this sort of talks. Wenger will not allow it for sure. Podolski is alredy there so one problem is solved, and RVP will not be able to state that "I can not carry you all guys on my own". And he is clever enough to know that even if he asks about this summer transfers he will not get an answer other than - "We will add quality if we find it".
So I am pretty sure they will talk about money mostly. RVP and his agent surely already have a number in their heads. The fact that they will talk next week is encouraging - that means RVP is not really waiting for offers, even if it will help him to negotiate a larger salary. We will need to worry if these talks will be postponed until after the Europe Cup. That might mean Arsenalare not prepared to pay what RVP is expecting.