Given some refinements in design, they estimate it may be possible to convert enough energy such that the harvesters alone would be sufficient to power all of the implants in thecyborg beetle.
So, if I finish the game as a Siren, and decide to start from scratch as a Ninja (or as the promised DLC character, thecyborg Mech Romantic), I can take my levels in badass with me, giving me Level 1 character the ability to burn through the initial challenges of the game, or help out higher-level characters in multiplayer.