Random
Didn't **** any of those *****es
It's not even a movie property if it doesn't have sequels. It's just one movie. And even if it has a hundred bad sequels, the first, good one isn't ruined in any way.
And making a sequel doesn't automatically mean it's bad. So there's no harm in making it and hoping for the best. And even if it's bad it doesn't mean people won't like it.
Plus, I would argue that the majority of super-hero sequels are better than the originals.
I'm just saying that usually sequels turn out bad (though recently its been better). A lot of sequels can be bad and sometimes retroactively make the previous movie stink by association. So why waste all that money on a sequel (I'm speaking generally, not directed at TIH) that will most likely turn out bad, than make a new potentially good movie.
Honestly, instead of the Leader cameo, I don't think a hulk sequel is warranted or that the character and potential storyline can sustain a second movie. I say continue the story in the Avengers movie