Why is chris evans not sure about fantastic four 3?

Chris Evans has expressed uncertainty about returning for "Fantastic Four 3" due to his deep connection to his role as Captain America in the Marvel Cinematic Universe. He has indicated that revisiting his previous role as Johnny Storm, also known as the Human Torch, would be challenging and may not align with his current career trajectory. Additionally, he seems to be focusing on new projects and opportunities that allow him to explore different characters and narratives.