In 2005 Jenkins wrote the Dark Horse Comics six issue miniseries "Revelations", illustrated by Ramos, and Marvel's "The Sentry" with artist John Romita Jr.. In 2006 he wrote his own independent comic, "Sidekick", published by Image Comics. That same year, he wrote "", a tie-in to Marvel's crossover storyline, "Civil War" that depicted the transformation of Robbie Baldwin from Speedball to Penance, was expanded on in the limited series "Penance: Relentless". It also led to "World War Hulk: Front Line". He also took over the writing on "Son of Hulk" when it lost its focus on Skaar, the series ran from No. 13 to 17.