This does not fall under the banner of accessibility, but is something that is still relevant to gamers with disabilities and could be quick and easy to implement, and that has had some heartfelt requests and votes on console forums. A nice way to represent the diversity of the audience, and tie in with the wider inclusivity efforts. Even if it was just a wheelchair to start with (a common request), that’s something that could be built on in future. Consultation is key, for example Xbox’ recent avatar exploration work resulted in some significant and useful public feedback on wheelchair design.
Xbox wheelchair avatars, pre wheelchair design feedback