Personally for me, regardless if there's a rematch clause or not, I'm not really thinking anything about rematch. But if I will share my own opinion about that, I don't see Fulton will consider a rematch if he lose but instead, will focus on moving up weight.
Good point, we've heard that he wanted to go up in weight already, but maybe he was advise by his camp to still campaign here even at the last time to face Inoue. As he is a good name in his resume and he will be really tested on this one. So I will say that it's a good move for him and it's a win win. Even if he losses this fight and the belt, he will proved to the boxing fans that he is not afraid to face anyone in the ring even against the Monster in his own country. And boxers love this kind of challenges and this is a great opportunity for Stephen Fulton to cement his legacy this early in his career, rematch or no rematch.