Marvel: They Were Invaded by DC at the Beginning!

When Tony Stark, the Iron Man of the Marvel Universe, and Bruce Wayne, the Batman of the DC Universe, were transported to each other's universe by a mysterious energy wave, they discovered that both universes had been invaded by villains. Tony found that his technology and equipment could not be used in the DC universe, but he met "The Flash" and other DC heroes, and they decided to join forces to resist the invasion of the alien villain "Dark Nebula". Tony hatches a plan with Bruce, and the heroes of the two universes begin to work together. They each used their own technology and abilities to create a new weapon and ultimately succeeded in defeating the Dark Nebula. However, they discovered that this was just the beginning of a larger conspiracy. The mysterious organization attempts to merge the two universes, which will lead to the destruction of both universes. Tony and Bruce decide to continue working together to stop this conspiracy and separate the two universes. They know it will be a tougher battle, but they also know that only by working together can they win. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.