Black Panther

T'Challa is the King of Wakanda and the current Black Panther.

How Captain America Civil War Should Have Ended
T'Challa is first seen as Black Panther alongside Team Iron Man as Spider-Man webs up Team Cap. Later, when Tony Stark apprehends Helmut Zemo, T'Challa watches from the shadows.

At the Super Café, T'Challa joins Team Iron Man at their own booth, adopting Batman's pose. He expresses a preference to join Team Cap and, after joining Team Iron Man in singing Captain America's theme song, gets up and confronts Batman for his seat. An exasperated Superman attempts to give up his seat for T'Challa, but Ant-Man is revealed to have been sat on by Superman the whole time.

How Black Panther Should Have Ended
In the ancestral plane, T'Challa looks for his father T'Chaka, but encounters Mufasa.

During Killmonger's rescue of Klaue, T'Challa prepares for another chase scene, but is told by Shuri to take a car-disabling device. He does just that, and does a victory pose.

At the final battle, T'Challa is battling W'Kabi when Captain America arrives. T'Challa awkwardly explains that they are having a disagreement, and shoos Captain America away.

In an alternate reality caused by T'Chaka taking N'Jadaka with him, T'Challa, Shuri, and N'Jadaka stand alongside each other at N'Jadaka's former home, Oakland. The three decide to change the world technologically, with T'Challa ordering the reconstruction of the Super Café. At the new café, Batman, Superman, and T'Challa remark on the usefulness of vibranium, but Batman notes that T'Challa might need the vibranium more than ever as Ebony Maw and Cull Obsidian rampage outside.

During the end credits, T'Challa meets Blade, who offers a challenge.

How Avengers Infinity War Should Have Ended
Black Panther is first seen alongside the Avengers and Wakandans as they prepare for a battle. However, Wong arrives and traps the invaders in the Mirror Dimension.

T'Challa later joins the Avengers and Guardians at the Super Café and joins them in reminiscing of past battles and events.

Trivia

 * In the Civil War HISHEs, Black Panther was voiced by Jon Bailey, the narrator of Honest Trailers. Starting with the Black Panther HISHE, he is voiced by YouTuber Azerrz.