Iron Man 3...Weekend #3...

...well, while Star Trek Into Darkness took the top spot, IM3 was in second place - taking in over $35 million in the U.S. over the weekend.

This puts the worldwide total over the $1 billion mark, and places IM3 in the top ten highest worldwide gross films of all time.

That's darn cool.

Now, will Thor: The Dark World or Man of Steel come even close to this? Probably not.

But that's not the point.

The point is that this film...along with The Avengers (also in the worldwide gross top ten)...prove(s) that "super-hero" films, when done well, make money.

And as long as the production companies make a profit, they'll keep making these films.

What I'm wondering is - where is the line?

At what point would Fox, WB, Sony, Lionsgate or even Disney say: "These types of films aren't making (enough) money anymore, so all current projects are going on 'hiatus'."?

And we all know what "hiatus" means...