Going by rumors and leaks, this is the movie.
>Thanos and his followers Corvus Glaive, Proxima Midnight, Ebony Maw and Cull Obsidian destroy Xandar to reclaim the Power Stone in order to rebalance the Universe.
>Thanos and his followers attack the Asgardians' ship and slaughter several of them. Valkyrie escapes with survivors. Hulk tries to fight Thanos and is beaten so savagely that he has to turn back into Banner to survive. Thor is also beaten.
>Loki uses the Space Stone to teleport Banner to Doctor Strange’s Sanctum in New York City before surrendering it to Thanos in exchange for Thor's life. Thanos executes Loki and leaves Thor to die in space.
>Doctor Strange and Wong find Banner, who is unable to transform into the Hulk. Banner meets Iron Man and alerts him that Thanos is coming for the Infinity Stones.
>Thanos' warship, Sanctuary, arrives in New York City, and Ebony Maw and Cull Obsidian attack the Sanctum in search of the Time Stone. Spider-Man arrives to help. Doctor Strange is captured and tortured by Ebony Maw. Iron Man and Spider-Man manage to infiltrate Sanctuary to rescue him and end up in space.
>Banner is left behind and contacts Captain America for help. Corvus Glaive and Proxima Midnight attack Scarlet Witch and Vision in Scotland to steal the Mind Stone, but are foiled by Captain America, Black Widow and Falcon. Vision is taken to the Avengers' compound, where they meet with Banner and James Rhodes. Captain America decides to take Vision to Wakanda so he can be repaired and protected.
>The Guardians of the Galaxy find Thor adrift in space while following Thanos’ trail of destruction, and split into teams, with Rocket and Groot accompanying Thor to visit the dwarf king Eitri, who forged the Infinity Gauntlet. Thanos has cut off Eitri’s hands to prevent him from interfering with his plans, but Thor manages to operate Eitri’s star forge and create a new weapon, the axe Stormbreaker.