According to multiple reports, part of the new collective bargaining agreement will likely include the seventh team in each conference added to the playoffs. It would also mean that a third and fourth game would be played on Wild Card weekend.
According to the reports, the NFL is wanting to expand the playoffs to seven teams in each conference. This would put the 7th seeded team against the 2nd seeded team in the first round of the playoffs and by doing so would only give the top seed a first-round bye.
There is no real reasoning behind making this part of the NFL landscape outside of the fact that it brings more money into the NFL coffers.