https://www.cnet.com/news/avengers-infinity-war-tv-spot-makes-a-wakanda-starbucks-joke/

The minute-long teaser does replay some scenes we've seen (Spidey's Spider-Sense raising his arm hairs while he rides the school bus) but also delivers some satisfying fresh bits for fans. Captain America (Chris Evans) greets old pal Bucky (Sebastian Stan). Thanos displays the Infinity Gauntlet, which looks like it might contain the Soul Stone. Shuri impressively puts her sonic blasters into action.

In fact, most of the best moments of the new spot belong to the Wakandans. In one of the most memorable moments of the ad, Black Panther (Chadwick Boseman) leads his Wakanda's warriors in a chilling chant. They seem to be chanting "Yibambe!" which is being translated online as Xhosa for "hold fast" or "hold position." It's a word that's also spoken in Black Panther by Nakia (Lupita Nyong'o).