Baby Groot
First thing's first. Baby Groot is so damn cute I could die. He really looks like he's going to steal the show for this movie. I wonder if he will grow in the third act.
Visuals
This trailer right here has the best visuals ever in the MCU. Looks so damn pretty. That color scheme tho'
Drax
Drax also stole the show in this trailer. Dave Batista proves yet again that he's a great actor. The comedic appeal he has is priceless. Drax!
Mantis
Mantis! She is my favorite Guardian and I'm very happy to see her finally be in a Marvel movie. Would have liked to see her with green skin, but with Gamora already being green it's understandable. Hope she has a big role in the movie.
Final Thoughts
Marvel continues to prove that they know what they are doing. Most of their films have been great and this looks to be another one. Really wish them big success on this sequel. Well deserved.