BBM has been quietly releasing sets in its "Legends" series now for quite some time. Each set contains a large number of retired players, generally focusing on a team's dynastic era. In the thirteen season span of 1982-1994, the Lions were the Pacific League's most powerful team. This set focuses on that era.
As NPB Card Guy mentioned, the Lions won 11 PL pennants and the Nippon Series eight times. I'd say that's pretty successful! This is the fourth (of five so far) in the series, and was released in late November.
I like the look of the Legends sets, and like the Achievement sets it's a good series to continue.