Froch is at the top of his game and coming of a career high performance. His Las Vegas fight has gone with Junior losing, Ward does not want to come to Nottingham, he does not want to fight Groves again, Degale is a style nightmare, Kessler is retired and he has no interest in moving up in weight.
Froch options are limited.

If he can motivate himself to get back in the ring then he should be allowed to do that. If I was Froch I would get in the ring just to stay busy and relevant even a non-title fight but he may not want that.