I could see it Meron taking over in this case; after Louis left, there was instability in the group and Meron used that opportunity as an in. He probably has a pretty nasty reputation in the underworld (the guy takes down ELEPHANTS! Don't know how, but ELEPHANTS!), and given what they're saying about him, hybrids have the potential to be higher spec than either of their already so it shouldn't be too tough. Put up a good show of strengthening the group, and slowly start implementing new policies. Given that the lions weren't overpowering even at their best (they were beaten by a panda and a juvenile wolf...), the new dietary policy probably cinches it.
Having said that, they probably could manage to sneak up on him and take him out through numbers, but a few of their own are probably going to die in the process, so they're not willing to commit to it yet. Ah, the good ol' days of eating meat while serving under an herbivore...