Ultraman x Avengers #4

The Avengers and the Ultra Guard take to the stars in pursuit of Galactus! Can they stop the devourer of worlds before he reaches his terrible destination? What villainous force is vital to their last-ditch plan? And which hero comes in with a surprise assist...in a giant mech? Find out in this conclusive chapter of the epic crossover event, ULTRAMAN X AVENGERS!