1. Go to wbgames.com
2. Tap on the icon in the top right
3. Then tap account settings
4. Then go to Connections
5. Tap connect Netflix
6. Tap continue
7. Enter your email and password
And now you should be ready to go

Find Breaking Bad here https://www.netflix.com/browse
Remember you have to watch all 5 seasons and every episode
Note: If you've already watched it you might need to rewatch it, hopefully this gets fixed in the next update

You should see him in the character select screen after you restart and update the game