I think that if Messi had moved to the Premier League and to one of our rivals this summer he'd have a thread dedicated to him specifically, and it would be very busy if two or three posters had decided to trash him simply because he played for one of our rivals. This is why I think it's a bit of an unfair comparison. We reset the forums and lost a fair bit of activity along the way, which is why there isn't a Messi thread anymore. Also because at this stage there isn't much that needs saying about Messi, there's next to no debate to be had, he is basically the greatest and that's all there is to it.
Also, to put it lazily, Ibrahimovic is box office. He's a larger than life character who often says outrageously arrogant things, that seem to amuse and alienate people in equal measure. Lots of people think he's hilarious and the man, whereas others think that he's an arrogant bellend. He provokes discussion.
He's an astounding footballer but as a character i think he's a twat, and I think his arrogance is now too self aware and artificial and is all about maintaining "Brand Zlatan", but even though I don't like him at all it's still tempting to come to come to this thread to laugh at those who needlessly tried to talk him down.