Avengers Wars Episode IV: Soul Sacrifice

Thanos and his Dark Order seek to wipe out half of all life using all 6 Infinity Stones while Palpatine's Earth based Empire seeks to use the Death Star to kill Thanos's forces and the Rebel Alliance while claiming the 6 Infinity Stones for himself.

Thor, Hulk, Scarlet Witch and Spider-Man emerge from a Multiversal Core energy anomaly that was caused by Ant Man and the Wasp on San Francisco/Scarif which was a distraction that allowed the Rebel Alliance to steal the Death Star plans. Thor lands in New Mexico/Tatooine while Scarlet Witch lands in space on the Guardians ship as the cross an interdimensional pathway from the Andromeda Galaxy to the Milky Way Galaxy. Hulk lands in the Sanctum Santorum in London Coruscant and helps Doctor Strange and Wong protect the Reality Stone that Strange stole from Emperor Palpatine.
Spider-Man lands on the remains of Alderaan/Switzerland after it's destroyed by the destroyed by the Death Star. This motivates Iron Man to defect from the Empire and help a disoriented Spider-Man who has been stuck traveling through other universes for years battling Darth Maul.

Various factions of Avengers work with the Rebel Alliance to defeat the Empire and Thanos's forces to prevent Earth from being a victim of Thanos's finger snap or the Death Star's destructive power. It's at this time Obi Wan Kenobi tells Luke Skywalker about his destiny as the one who will save everyone and that he was hidden from the Empire for 19 years to ensure that this will happen.