Cam would make over 55 million during those seasons, If the Panthers play him under the 5th year option and franchise tag him in back to back seasons. On top of that, all of it would be fully guaranteed. That's leverage, if any thing ever was.
How long have you been following football?
Do you know how much leverage the players have under the current CBA?
He will have no leverage, especially if he is talking about holding out, or getting moved to another team, it's just how it is these days. We can have him under contract all of this season, and the next two, and there is nothing he can do about it.
Do you think that he, or is agent want to play 45 or so games over the next 3 years without a long term contract?
He will get the deal that he deserves, but he won't be holding out (briefly if at all) or getting shipped out (unless the FO wants to do that).
As for his contract value, Cook is going to ask for Cam to be the Highest paid QB, with the most guaranteed money.
All the proof you need to know, thats going to happen, is too look at Jay Cutler's 7 year 127 million dollar deal and yes cam's will be worth more.