The franchise revealed subtle changes to the logo and how the word "Lions" is spelled out during a news conference Monday attended by dozens of fans.
Detroit stumbled to the NFL's first 0-16 season last year and has the first pick Saturday in the NFL draft.
The leaping lion appears more fierce, while the team name features an italicized slant.
The team says the changes are consistent with its "sense of mission and direction."
New trim lines also have been added to team uniforms. The team's Honolulu blue, white and black colors remain unchanged.