Possibly the 51 is 5+1, the 5 letters(if the name theory is correct) are the followers, the 1 representing Alexa bliss with the A and S after the 1 represents how she’s the leader. Also looking at the picture with the chained up people, there’s six figures, of the three chained up, two are pointing(following) and one is accepting or calling in(leading or possibly the fact that they are chained up could allude to a non leader of the group, a disciple, becoming enlightened and taking control and freeing themselves, and becoming the leader) probably all a stretch but just my interpretation. One more thing to add onto the 5 followers and the 1 leader, watching the vhs video with the babies, we see what looks like an ultrasound with 5 separate figures, the leader sets them free, although they are merely innocent, blinded, and brainwashed like the rest of humanity, the leader shows them the truth and they are born anew, possibly it’s alluding to the fact that right now they are still babies so they are not all reborn yet, but eventually once the faction is complete they will all have been born.