As if life in the post-Infinity War world weren’t already complicated and terrifying enough, the first trailer for Avengers: Endgame has only served to make things seem even more daunting. With even more questions and very few answers to go around, we’ve been left to start speculating wildly about the future of the Marvel Cinematic Universe — and we keep circling back to one very specific moment in the trailer as a jumping off point. Scott Lang has apparently returned from the Quantum Realm in one piece — and he’s arrived at the Avengers compound with his Quantum Tunnel-toting van in tow, which we’re guessing will play a key role in finding a way to defeat Thanos.
The surviving Avengers are, demonstratively, pretty down and out at the start of Endgame. They lost the fight in spectacular fashion and have no Infinity Stones to their name, no real magic users to speak of save Thor who, honestly, seems a little worse-for-wear in the trailer, and no real resources at their disposal. But, Steve and Natasha have a plan — and, though it’s clearly a Hail Mary play, it’s certainly better than nothing. Using what we know based on what little we have, it’s not a total stretch to say that the Quantum tech in Scott’s van is really the only potential ace in the hole Steve and Nat have at the moment, and, because getting really, really small probably isn’t a great combat advantage, given the circumstances, it’s more likely that there’s something else in play here.
Source: IGN.com What Is Captain America’s Plan in Avengers: Endgame?