On Friday 5th April Marvel showed footage of Avengers Endgame which has never been seen before, to all their investors at cinema-con in California. apparently it contained footage of Hugh Jackman in it. they showed Wolverine (Hugh Jackman) kind of talking to Black Panther, it shows Wolverine saying “what is this place?” and it cuts to Wakanda and Black Panther.
Image Source: ComicBook.com
People are taking this out of context. This does not mean Wolverine is in Avengers Endgame. It is a sizzle reel and a sizzle reel is a combination of multiple videos to show a single video. So this was not a new footage but it was an old footage for his first X-Men film in 2001.
This video was shown stating that, marvel now has the X-Men, since the Fox – Disney Deal. Marvel also states that there will be a crossover between the X-Men and the Avengers in Future movies now that Marvel has the X-Men.