So it was most likely Beckman in the end, but seeing how it was some time even before his attack on WCI, it's understable. And judging by Lime Juice's reaction, it's actually possible he at least humiliated him, before ultimately getting destroyed by Beckman
This time will be used to show that Kid became much stronger since that previous encounter with the Red Hair pirates, with Kid this time fighting Shanks while Killer would take the burden of his captain by handling the guy who took his arm(Beckman)