Ultimate Power is a nine-issue comic book limited series published by Marvel Comics.
The series is a crossover that ties the Supreme Power universe into the Ultimate Marvel universe and is written by Brian Michael Bendis, J. Michael Straczynski and Jeph Loeb with art by Greg Land.
Ultimate Power signifies the first complete Ultimate Universe crossover, that effectively integrates all current ongoing series. Ultimate Power is also the first crossover that spans another already extant Marvel Universe. Creators have hinted that events chronicled in the miniseries would have lasting effects on status quo in both universes.