One common theme is the exploration of their complex relationship. Given their different personalities and backgrounds in the Suicide Squad, fanfictions often delve into how they interact, from initial distrust to a possible deeper connection.
Overall, Peacemaker is reasonably faithful to the comics. Some details might be tweaked for the screen adaptation, but the core elements remain intact. The characters and their arcs are largely consistent.
It depends on your perspective. Peacemaker has complex traits and actions. While he may do things that seem heroic in some situations, his methods and intentions can be questionable in others.
Definitely. Peacemaker is an actual comic. It offers unique story arcs and character developments that have captured the interest of many comic enthusiasts.