The fact that Froch was such a heavy favourite and made several promises to knock Groves out, coupled with the fact Groves was ahead and the referee stopped the fight prematurely would suggest Froch should rematch Groves, because trying to tell everyone there was no doubt Groves was finished isn't washing with the fans and he's lost quite a buit of popularity over it.
I dont see why so many people are suggesting that Froch can be forgiven for going after bigger money fights? Surely the controversy surrounding the stoppage, coupled with the fact that Groves was clearly winning has generated enough interest in a rematch to justify a purse to rival any other fights he might persue. I believe right now Froch/Groves II would probably generate more revenue then Froch/Ward II