User blog comment:Johnnybravo44/Infinity: The grandest Marvel Comics event of all time?/@comment-1895174-20130208022848

So...

Huge Marvel Comics event featuring the main villain of the sequel to The Avengers as its main villain.

I can't see any alternative motive for that...

No really, that's a really good idea. Thanos isn't well known outside comics, and, while this wouldn't do anything to really help that, comic sales were up big last year. They need to put this guy everywhere they can.