All you need to do is press start or (
) go to extras and enter the code Bane-
XZKLKQ it will unlock him and in freeplay / batcave etc... hold (
) for the character select and bane is at the very end at the top right.
Select Bane then hold (
) to transform into Bane (Venom-Powered) along with achievement.
I included other cheats/character codes below. Aswell as a youtube video
Festive Hats PHHGPH
Fight Captions EWTPKA
Minikit Detector JYJAFX
Quest Detector KNJBD8
Studs x2 5MZ73E
Characters
Aquaman V3GTHB
Atrocitus ZGCEAJ
Bane
XZKLKQBatgirl 4LS32K
Batman Of Zur-En-Arrh ZWQPJD
Beast Boy YC3KZZ
Blue Beetle APEKBV
Deathstroke 5SW59X
Doctor Fate 4HRERD
The Fierce Flame NQ46RC
Frankenstein FQ4ESE
Giganta 95U7BM
The Joker 9WYGLP
Kevin Smith J6ANCT
Lobo B5ABPQ
Music Meister S7GSDE
Nightwing N9CZ7S
Plastic Man H2VB8Z
Red Hood TRQTPS
Superboy QDQ3YL
Here is the originial Xbox One Upload
https://account.xbox.com/en-us/gameclip/e7fd2086-0e28-4701-9... and the youtube video is below.