Yes! It is happening!
After so much drama relating James Gunn and Drax's actor, Kevin Feige made it officialy that GotG will happen at some point in Phase 5. It currently doesn't have a release date, but expect it rather soon.
All of the guardians will be back: Quill, Gamora, Rocket, Drax, Mantis and some
sort of version of Groot (I am really curious to see which one). We will also the Sovereigns again and Adam Warlock was heavily rumoured and partially confirmed for this one.
Can't wait for this movie. I loved the original two ones, and I just love the guardians in general.
Let me know what you think.