The Stephanie Brown Batgirl figure has some great lore connections with her history:
Her boomstick from Batgirl #8
Her Electro-Magna-Gooperangs from Batgirl #20
Her Insulated Suit from Batgirl #4
The ability "I Got More Clues Than My Dad" as a reference to her father, the Cluemaster
She also gets a bonus when in contact with Proxy.
Her significant appearance listed is Batman Incorporated: Leviathan Strikes
WizKids ran an event in 2016 called the "Batgirl OP", featuring Steph, Batgirl of Burnside, and Black Bat Cassandra Cain: http://wizkids.com/heroclix/dc-comics-heroclix-batgirl/
Steph got an updated card for this event.