The next system after Katia will be Lee. There is an elongated area of low pressure in the Gulf of Mexico with a real good chance it could become a depression over the next few days.
The big question with a tropical system so close to us, is... "where is it headed?". The answer is up in the air... really.
We need to watch for some strong upper level winds moving into the region. They will dictate where this system will ultimately end up, the problem is, the models can't agree as to where and when the upper winds will appear.