It might not be in a position just yet to challenge "Titanic" 10-year rule on top of the all-time box office, but the "Batman Begins" sequel "The Dark Knight" is certainly giving the James Cameron film a run for its money.

The film earned $75.6 million in domestic box office over the weekend to up its total to $314.2 million, hitting the $300 million mark in just 10 days, shattering the previous speed record to $300 million of "Pirates of the Caribbean: Dead Man's Chest," which hit the $300 million mark in 16 days.

Dan Fellman, the distribution head at Warner Bros., told CNN "The Dark Knight" could hit $400 million by next weekend if not a few days later, easily destroying the record set by "Shrek 2" in 2004 that hit the mark in 43 days.

"The Dark Knight" easily was the top movie in the nation for a second weekend in a row, clobbering "Step Brothers" with a $30 million take. "The X-Files: I Want To Believe" bombed at the box office with just $10.2 million, fueled in part by the fact many fans have long moved on from the film, and its poor reviews.

Some analysts think that "The Dark Knight" can challenge "Titanic." That film, between 1997 and 1998, pulled in more than $1.8 billion worldwide, but just $600.8 million domestically. "The Dark Knight" already is halfway there, but still has a ways to climb. According to MovieWeb, the Batman film is No. 22 all time, ahead of "The Lord of the Rings: The Fellowship of the Ring" and "Indiana Jones and the Kingdom of the Crystal Skull."

"The Dark Knight" was less than $1 million behind the domestic take of "Iron Man," which opened in May. If Fellman's predictions are right, "The Dark Knight" could jump into the No. 8 spot all-time by next weekend displacing "Star Wars Episode III: Revenge of the Sith." It then would have to earn another $7 million to top "Spider-Man," and earn another $25 million on top of that to get into the top five, which would knock out "Star Wars Episode I: The Phantom Menace."

The top four films are "Titanic," the original "Star Wars" ($461 million), "Shrek 2" ($437 million) and "E.T.: The Extra Terrestrial" with $435 million.

To provide some perspective, however, if the top box office picks were adjusted for inflation, "The Dark Knight" is still $30 million behind from even cracking the top 100 films of all time. "The Matrix Reloaded" is No. 100 with an inflation-adjusted take of $330.6 million, according to Box Office Mojo. Reaching $400 million, however, would move it into the 63rd spot, toppling "Finding Nemo." But even if it just beats "Titanic," the film will barely be in the top 20. Even just 10 years of inflation have moved "Titanic" to $908.7 million domestically, enough only for sixth place. The top spot is held by (and likely always will be held by) "Gone With the Wind" which earned $198.7 million in 1939, which translates to $1.4 billion today.

"The Dark Knight" dropped about 52 percent from its record opening weekend.

Feeling a little horrific? Get your daily dose of horror news straight from The Doll, Rabid Doll that is at www.RabidDoll.com.

Hear Michael Hinman on SyFy Radio every Wednesday at 10 p.m. ET/7 p.m. PT at www.BlogTalkRadio.com/SyFyRadio.