I don't have experience of dealing with bladder and prostate cancer at the same time. I would imagine that your consultant will explain what the possible treatment options are and how they interact with your current treatment.
You have a lot to deal with, will there be someone with you at the consultation to help take all the information in?
I wish you all the best, please update us when you can. Also I wanted to reply in the hope that someone with more experience than me will reply to you. Ian.