Two seats remain in F1: How do things stand at VCARB and Sauber?

Only two seats remain vacant in Formula 1 for the 2025 season. Only Visa Cash App RB and Sauber (the future Audi) are looking to sign a second driver for the upcoming season, with rumours circulating about who will fill them. GPblog lists who is currently the favourite for each seat and also an outsider.