The Guardians of the Galaxy somehow receive the emergency signal and oh yeah, Groot is no longer a cute baby sprout, he is now a pouting teenage tree who like to play video games. The team save bruised Thor. Thor then woken up by Mantis. There's a scene where Thor, compares muscles with Drax and speaks in a deeper voice than Star Lord. It was funny when Thor annoys Rocket by calling him “Rabbit”...LOL
Back in Earth, The Hulk now Dr Bruce (because the Hulk refuse to come out) warn Ironman and Dr Strange about Thanos. Tony Stark aka Iron Man trade sarcasm with Dr. Strange, in my opinion both are wealthy geniuses without inherent super powers. Both relied on technology, Ironman with armored suits and Dr, Strange with capes to get the job done.
In the end, Thanos get all the infinity stones, really no hope for the universe. As the film cuts to black, somebody at the back shouted, “Itu saja?!?” (that's it).
Indeed, the end keep us wondering what happen next when there's no hope. One by one the heroes character dissappeared. Until then, we have to wait for part two... Hopefully early 2019!