Strikeforce heavyweight champ Alistair Overeem and Bellator lightweight title-holder Eddie Alvarez were among the winners on Sunday at DREAM 12 in Osaka, Japan.

Overeem submitted James Thompson with a guillotine choke in under a minute in the DREAM 12 main event, while Alvarez used an arm-triangle choke to defeat Katsunori Kikuno in the second-round of their featured matchup.

All eighteen fighters scheduled to compete at tomorrow’s DREAM 12 event in Osaka, Japan hit the scales earlier today to weigh-in for their bouts. Lightweight Won Sik Park was the long fighter on the card who failed to make weight on their first attempt, with notables Alistair Overeem, James Thompson, Eddie Alvarez, Kazushi Sakuraba, and Chase Beebe all hitting their marks.

The Japanese promotional group FEG, which runs the Dream MMA events, has long be suggesting that they had a big surprise in store for their already announced Dream 12 event, which will take place on October 25 in Osaka, Japan. They had already released a short promotional video in which were a few shots of a cage which led some people to believe that would be the surprise. Those people were correct, and Dream has officially confirmed that with a new promotional video for the event (included below).

Marius Zaromskis won the DREAM welterweight grand prix and became the promotion’s first-ever 76kg champion on Sunday by upsetting Hayato “Mach” Sakurai and Jason High with back-to-back knockouts at DREAM 10 in Saitama, Japan.

In other DREAM 10 action, Shinya Aoki topped Vitor Ribeiro by unanimous decision in a lightweight bout that filled to live up to expectations TUF 7 cast member Jesse Taylor defeated Dong Sik Yoon, who was unable to continue due to a left ankle injury, and former WEC champ Paulo Filho submitted kickboxer Melvin Manhoef in the opening round of their middleweight matchup.

Though it wasn’t without a notable struggle, all 14 fighters successfully made weight on Sunday for DREAM 10, which takes place overnight in Saitama, Japan and airs live on HDNet.

Welterweight grand prix participant Hayato “Mach” Sakurai struggled to reach the 76kg limit for his semifinals bout against Marius Zaromskis, but eventually dropped the necessary weight for his third weigh-in attempt.

DREAM has released the finalized fight card and bout order for Monday’s DREAM 10 event, which takes place at the Saitama Super Arena in Saitama, Japan and airs live on HDNet.

The official fight card, which includes Shinya Aoki, Jesse Taylor, Paulo Filho, and Melvin Manhoef, is after the jump.

Lightweights Shinya Aoki and Vitor Ribeiro and middleweights Paulo Filho and Melvin Manhoef will square off at DREAM 10 on July 20th in Saitama, Japan, the promotion announced on Tuesday. DREAM also added a lightweight bout between Katsunori Kikuno and Andre Amade to the card.