Wolverine's Claws
Wolverine's Claws have become one of the most iconic images in X-Men - if not film - history. They evoke in viewers a sense of history of previous X-Men films. They also underscore the film's violent, dark, and at times solemn tone.
X-24
The X-24 is not merely a secondary antagonist in the film; he is a younger version of Logan created to become the ultimate killing machine. His image reminds viewers of past X-Men films and reminds them of Logan's exceptionally violent past.
Logan's Death
The horribly brutal image of Logan's death - his body impaled by a tree - marks the end of an era. It also signifies Logan's tremendous sacrifice for Laura and her fellow mutants.
The Alkali-Transigen Logo
The image of the Alkali-Transigen logo reminds viewers of the company's evil deeds. In particular, it reminds viewers of how they created Laura and her fellow mutants and how they treated them horribly. It is truly a symbolic of evil and violence and death and oppression.