I think previous box-office figures show this not to be a concern.
Summer 07 was a hugely packed summer for blockblusters. Spider-man 3, Pirates of the Carribean 3, Shrek 3, Oceans 13, Fantastic Four 2, Die Hard 4, Transformers, Harry Potter 5, The Simpsons, Bourne 3, Rush Hour 3, Ratatouille.
All of these films made superb money at the box office. Many surpassed expectations.
Pirates was in direct competition with Spider-man 3, and both were the culmination of very successful franchises.
So why would we worry about competition from Avengers?
I can't see any minority of the mainstream audience deciding to see one film over the other.
True it won't make as much money as it did this summer.
This summer The Dark Knight was in competition with nothing. For a long time. Which is why it was successful. Give me all this 'perfect storm' crap and I'll point back to what I've just said. It was a summer with only one event movie. Only one movie everyone was expecting and looking forward to. Last summer had endless event movies (in a great long string of dissapointments) and the money rolled in for all of them nicely.
The hype for the Dark Knight was strong, but just as strong as it was for Spider-man 3 and Pirates 3, and not a lot stronger than for all the other movies I've just listed.
It happened to have the luck of being the only hyped-up film of this summer.
If Avengers is hyped up to the same degree as The Dark Knight's sequel, it will only produce figures similar to last summer when Spider-man 3 and Pirates 3 were in competition.
If there are a host of other films also hyped up? They'll probably steer clear of these two with their release dates, and if they don't, the industry has handled stronger forces before.
Also, the success of Avengers depends upon so many factors:
- The continued success of Iron Man (Big factor)
- The success of Thor, Captain America and other franchises
- The ability to put these characters together with credibility
- The special effects
- The Marketing.
The Dark Knight's sequel should have all factors garunteed:
- Returning cast and director (it's practically a given)
- Marketing (They've proven they can tease)
- Previous quality reassurance
- Massive garunteed fan-base, even within the wider mainstream community.
You don't need to set anything up for the sequel, it's all been done.