KINGDOM had a relatively "low" budget for a big science fiction film at $130 million*, which is what it just opened to worldwide for its first weekend. I think the movie will turn a profit, and if they can keep the budget in that same area, I think there will be a sequel.
*It's really remarkable they were able to make the movie for that amount, not just because the apes look so incredibly realistic... but also because I've seen movies that cost twice as much that look half as good.