The Avengers – who, of course, originated on the pages of Marvel comic books – have become one of the biggest things in cinema since their debut in their 2012 titular movie.

As part of the Marvel Cinematic Universe, the team of superheroes has now had two of their own movies – 2015’s Avengers: Age of Ultron being the second – in a franchise that has seen twelve released to date.

On screen, the team has, thus far, included Iron Man, Captain America, the Hulk, Thor, Black Widow, Hawkeye, Vision, Scarlet Witch, Quicksilver, War Machine and Falcon, while others like Doctor Strange, Black Panther, Spider-Man, Captain Marvel and the Winter Soldier are expected to join in the future.

But which characters from other non-comic book franchises would make cool additions to the team and why? Let’s take a look, using only characters who, although they may have appeared in comic books, aren’t classically associated with the genre.

Illyria (Angel)

Illyria is arguably the most powerful character ever to appear in the Buffyverse – and that means she’s out of the league of the likes of Angel, Spike and Charles Gunn – so joining up with a big-league team like the Avengers would be far more fitting for her.

Of course, she’s extremely socially awkward, which would make for some extremely humorous interactions with the likes of Tony Stark, but she would be far more at home fighting alongside the likes of the Hulk and Vision than she would be with Buffyverse heroes.

Like Thor, Illyria is essentially a god, and he is proof that such characters can integrate in the Avengers’ world – and with powers like time dilation, she’d add some abilities that the team don’t currently possess, which could be very important to them.