In the good way, not the puke and fever way.
We're a long way off from Infinity War (part I is scheduled for 2018) but a few fans are clearly too impatient to wait. So they did us all an amazing service and created a trailer for it. It. Is. So. Cool. Jessica Chastain as Captain Marvel: Yes. The Avengers teaming up with the Guardians (having resolved all of their differences post-Civil War): Also Yes. Our friendly neighborhood Spider-man joining the fray? Absolutely yes!
My only complaint is that there's almost no Black Panther footage out yet- but thankfully that's going to change very soon!