A few more thoughts from the trailer:
- Yes, Barton's face shows a lot of pain, no doubt the IW snap dusted most if not all of his family.
- I wonder how much power and durability Thanos has lost after using the IG. This could be the decisive factor, along with having Captain Marvel, should the team be able to corner him again.
Lastly and most importantly, my message to Disney - please do not bring back the pre-snap deaths, i.e. Heimdall, Loki and Gamora, etc. Their deaths served the greater story, to reverse them just continues the fake death spree that the MCU is infamous for, and would seriously turn me off from future movies. There already aren't enough stakes in the MCU due to the overuse of plot devices bringing back dead characters.