It's fair to say that Square Enix's Crystal Dynamics is hoping to tempt PC players back with the War For Wakanda expansion – which will apparently clock in at around 7-8 hours of gameplay, the biggest DLC yet for the Marvel game.
Despite a successful launch that made Avengers the game had a rough launch and has been lacking in regular content updates ever since.
However, the disappointingly short Hawkeye expansions. According to Entertainment Weekly (via Marvel's Avengers Updates) the expansion will bring the game's total story content to around 25 hours.
According to How Long To Beat – which I can confirm is roughly correct – Marvel's Avengers main campaign is approximately 11.5 hours long, with the two Hawkeye 'Operations' expansions clocking in at around four and two hours each. Therefore, War For Wakanda must feature around 7.5 hours of story content – which will be free, incidentally.
https://twitter.com/PlayAvengers/status/1416147714362863619
Square Enix also revealed that Christopher Judge – best known as Kratos from Sony's God of War series – will be voicing Black Panther himself, T'Challa, the first actor to play the role since the sad ing of the movie's Chadwick Boseman last year.
As for Avengers, Square Enix that Spider-Man isn't coming to the PC or Xbox versions – and still hasn't appeared.