Cher,
Whenever they remove the bladder, they remove the prostate. Given that it was cancer in both, both are going to need to come out.
That's where you want the absolute best surgeon based on the diversion your husband chooses. He can choose, but they don't know until they are in there if it can be done. Generally, men choose the neobladder (use a segment of intestine to make a new bladder and hook it up to the original plumbing), the second popular choice is an Indiana pouch (they use intestine to create a pouch and then hook it up to a stoma and they catheterize when they need to but are continent) and the third choice is ileal conduit (no internal bladder replacement, easiest surgery and the ureters are connected to a stoma which they put a bag on for urine drainage). People choose different ones based on personal preference and most people are happy with whatever they choose (or wind up with).
It's great that your uro is recommending a second opinion. Sometimes they try to do it themselves and that often does not work out for the best interest of the patient.
Mike
Age 54
10/31/06 dx CIS (TisG3) non-invasive (at 47)
9/19/08 TURB/TUIP dx Invasive T2G3
10/8/08 RC neobladder(at 49)
2/15/13 T4G3N3M1 distant metastases(at 53)
9/2013 finished chemo -cancer free again
1/2014 ct scan results....distant mets
2/2014 ct result...spread to liver, kidneys, and lymph...