Box Office Preview: 'Godzilla' Eyeing $50M-Plus, 'Rocketman' to Fly to $20M

Meanwhile, the Universal and Blumhouse horror pic 'Ma' is anticipating a $20 million bow.

The summer box office is now in full swing, featuring this weekend's face-off between a kaiju and a rock star.

Legendary and Warner Bros.' Godzilla: King of the Monsters is tracking for a bow in the $50 million-$55 million range across 4,100 theaters, according to those with access to early surveys.

Vera Farmiga, Kyle Chandler and Millie Bobbie Brown star as a family in the movie that will see Godzilla collide with Mothra, Rodan and King Ghidorah. The large supporting ensemble includes Bradley Whitford, Ziyi Zhang, Ken Watanabe, Thomas Middleditch, Sally Hawkins and O'Shea Jackson Jr.

Michael Dougherty directed the latest installment in Legendary's mega-monster series, which includes 2014's Godzilla from Gareth Edwards and 2017's Kong: Skull Island. While some box office observes believe King of the Monsters' launch could reach as high as $70 million, its opening weekend is likely to come in below that of the other installments' debuts — Godzilla had a massive bow of $93.2 million (unadjusted for inflation), while Kong: Skull Island earned $61 million stateside.

Meanwhile, Paramount's R-rated Elton John biopic Rocketman is tracking for a solid $20 million bow on 3,600 North American screens.

Led by Taron Egerton, the Dexter Fletcher-directed musical follows the legendary singer-songwriter's rise to stardom and history with substance abuse. Bryce Dallas Howard, Richard Madden and Jamie Bell also star.

The movie premiered at this year's Cannes film Festival to positive reviews and currently sits at 91 percent on Rotten Tomatoes.

The weekend's third offering is the Universal and Blumhouse horror pic Ma, which is tracking for a debut of around $20 million across 2,700 theaters.

Octavia Spencer, who reteamed with The Help director Tate Taylor, stars as a middle-aged woman who befriends a group of local high schoolers, letting them party in her basement. But things quickly take a turn, as friendship turns into something far more sinister. The R-rated thriller has had a middling critical response, with a 62 percent freshness rating on Rotten Tomatoes.