Spotrac released a forecast of Luke Kuechly's contract extension. Here's a quick look. Feel free to make your own prediction in the comment thread.
Hat tip to Truethought for posting a link to this article on Spotrac.
First here's how they established there comparison model:
Contract Forecast: Luke Kuechly | Spotrac Research
To generate a prediction the Spotrac team determined that the following linebackers were viable targets to use in comparing with Kuechly. The key was to locate players with similar numbers, who signed their second contract around the age of 24.