I admit, I read this because of that scene in Avengers. As good of a reason as any, I think. And I'm glad that I did, because it's really enormous fun.
Yes, the exact dialog and the exact character designs are a bit dated. But George Perez is an artist I don't think I could ever get tired of, and the plot and pacing are exciting and absorbing. Thanos is a very intimidating opponent under any circumstances, and now with almost unlimited power, nobody can truly beat him but himself. So the strategy is to throw literally everything at him and hope he screws up somehow. And then things get more interesting. No, it's not high art, but if this is a preview of Avengers 2, it'll be a fabulous movie.