Who should he fight next??? At the very least, he definitely deserves a title shot against Senchenko for the WBA belt. Senchenko defends his "title" against Euro no names. If he isn't willing to give Brook a title shot, the WBA should vacate him, and have Brook fight the Aydin-Dan winner for the belt, or make a massive Brook-Khan fight for the WBA strap next year.
Who do you want Brook to fight next????
Jo Jo Dan? Selcuk Aydin? Vyacheslaf Senchenko? Devon Alexander? Andre Berto? Amir Khan?
He has loads of options.
If he does indeed fight on the undercard of Ward-Froch, you can probably rule out Andre Berto, Devon Alexander, Jo Jo Dan, Selcuk Aydin, and Senchenko...basically everyone I listed.
If that's the case, he should fight Zaveck. Than, he should get a title shot against Senchenko or Berto. If he were to dominate Zaveck, he should definitely get a shot against Berto. Berto beat Zaveck, but Zaveck had more than a few moments against him. Zaveck actually landed a ton of punches, it's just that Berto's were harder and Zaveck not a good enough boxer to out-box him. Brook...if he can take shots from Berto...he may be able to out-box him.
His next fight will be on the Froch-Ward card in December so I doubt it'll be a title shot. He'll probably fight for a title in the Spring and then fight Khan in the Summer... So they should keep Brook active against a proven welterweight.
Maybe test his chin against a banger like Randall Bailey.
Or put him up against a higher-quality opponent like Jan Zaveck, who only just lost his world title. See how Brook fairs in comparison to Berto. Still in his prime and has only 1 loss.
Or possibly Luis Carlos Abregu, who Bradley beat last year. Still only has 1 loss.