Avatar vs. Iron Man 2

I will go with Iron Man 2, because I like electronics and robotics more than genetics. And yes sometimes genetics become a big hit! like spider man, where Peter Parker was bitten by a spider. Although there is 0% possibility of the spider injecting DNA into him, we still believe and the children are overjoyed. In Iron Man, the concept of Arc Reactor is totally different and I believe that there will be something like that around in the near future!