HAWKEYE IS RONIN
Long speculated to appear in Avengers 4, Hawkeye is confirmed in his Ronin persona. This darker take on the character is introduced somewhat brutally, as Black Widow watches Barton take down a man in Japan.
The trailer voiceover does seem to indicate what drives Ronin to take up his sword. "We lost, all of us," Steve Rogers says. "We lost friends. We lost family. We lost a part of ourselves." As the narration continues, the trailer shows three characters: Thor, Nebula and Hawkeye. The framing of the voiceover seems to imply that Hawkeye has lost those most important to him, potentially confirming fan theories that his family -- first introduced in Avengers: Age of Ultron -- were dusted by the snap.
CAPTAIN AMERICA HAS A PLAN
Although the Avengers are down, they're certainly not out, as Captain America has a plan to defeat Thanos. "It's going to work, Steve," Black Widow tells Captain America aboard the Quinjet. "I know it is," he replies, "because I don't know what I'm going to do if it doesn't."
This scene probably comes from a little later in the movie. By this point, it's likely that the Avengers have regrouped, as attempting to fight Thanos with just those left alive on Earth seems like a pretty awful plan. The encounter with Thanos may end up proving fatal for Captain America, as Evans has previously indicated the film will mark the end of his time as Captain America. Still, directors Joe and Anthony Russo claimed in late November that Evans wasn't quite yet done with the Marvel Cinematic Universe.
SCOTT LANG RETURNS
During mid-credits scene for Ant-Man and The Wasp, Scott Lang was seemingly trapped in the Quantum Realm when Hope van Dyne, Hank Pym and Janet van Dyne were dusted following Thanos' snap. However, the trailer's very own post-credits sequence reveals Lang is alive, and free of the Quantum Realm.
"Hi, is anyone home?" Lang asks, appearing on a security camera outside the Avengers compound. "This is Scott Lang. We met a few years ago at the airport in Germany. I got really big. Ant-Man. Ant-Man? I know you know that. That's me. Can you buzz me in?"
Lang's appearance at the end of the trailer, alongside actor Michael Douglas' statements that the Quantum Realm is integral to the next stages of the MCU, lends further credence to fan theories that the Quantum Realm will play a critical role in the beating the Mad Titan.
Avengers: Endgame will arrive on April 26, 2019. Directed by Joe and Anthony Russo, Marvel’s Avengers 4 stars Robert Downey Jr., Josh Brolin, Mark Ruffalo, Tom Hiddleston, Chris Evans, Chris Hemsworth, Jeremy Renner, Chris Pratt, Elizabeth Olsen, Chadwick Boseman, Sebastian Stan, Benedict Cumberbatch, Paul Bettany, Samuel L. Jackson, Cobie Smulders, Benedict Wong, Zoe Saldana, Karen Gillan, Vin Diesel, Dave Bautista, Pom Klementieff, Scarlett Johansson, Tom Holland and Anthony Mackie.