Over the past week there has definitely been talk of a sequel to the film, largely from director Rupert Wyatt and screenwriters Rick Jaffa and Amanda Silver. Now, however, the likelihood of one is truly growing.
Rise was made for "only" $93 million, meaning that it has to gross $186 million to break in (which is Hollywood's usual formula -- negative cost plus marketing and the cost to make up prints). With the film opening in many more markets overseas this weekend, the odds are that it should be in the area of $150 million by Monday. Translation: we're VERY likely to see more adventures with Caesar and his friends.