After Brook lost to Spence and Golovkin and with Khan constantly dodging nobody is interested in him at that weight either.
When Junior beats Abraham this could be natural step up to an elite fighter but at a weight where Junior should win and gives Kell and last pay day in a massive PPV fight before he retires
Eubank Jnr now fights at Super Middle whereas Brook's last fight was Welterweight. I can't see Brook even entertaining fighting at 12 stone and unless Eubank drops down to Middle, again unlikely this fight in my opinion is highly improbable.