Nico Hulkenberg is headed to Sauber for the 2025 Formula 1 season. After Ferrari confirmed the signing of Lewis Hamilton in the winter, Hulkenberg became the second driver to announce a change of teams. The German has penned a multi-year deal with the Swiss outfit that will take in the transition to Audi in 2026. His contract at Haas had been due to expire at the end of 2024. Attention has now turned to the identity of his teammate. Audi could theoretically look to retain either Valtteri Bottas or Zhou Guanyu but neither option seems to appeal. Their top target, going by all indications, is Ca…