Someone mentioned Godzilla here. There should be a comic book where Weyland-yutani goes to Alien homeworld and finds a 300 foot Alien Super-queen, and smuggles it back to Earth, where to breaks loose, starts terrorizing and laying eggs everywhere and soon fights Godzilla and King Kong in a 3 way match. Throw in Engineer, black goo , King Ghidorah, Mothra too for an epic crossover.