Evidence of recycling games

The only thing that might be true that would come remotely close to that is if the Tiburon team has two Madden teams, each working on the game for about a year and a half, and then merging the two for each release. That would explain why every odd year iteration feels a little closer to the previous odd year Madden than the previous even year Madden does, and the same for the even years. But there is no real evidence for that, and there's certainly no evidence they "recycle" games from ten years ago. Borrow ideas from? Sure, in fact that's probably likely, since some of the newest additions to the Madden team come from that era as players of Madden. But "recycle?" Not likely.