Complex sentence: He joins a mob and comes face to face with the original incarnation of the X-Men, who the leader, Cyclops, says "they're not worth it" toward an enraged Iceman as they escape.
Split into simpler sentences: He joins a mob and comes face to face with the X-Men. The X-Men leader, Cyclops, refuses to engage with the mob, saying "they're not worth it" toward an enraged Iceman as they escape.