As I am writing this there no bicycle trousers for urban rain.

It is ordinary, water proof, breathing, rain weather trousers; but totally water proof where the seat is (otherwise water might get pushed through the pants); more sturdy around the knees and front part of the thighs as those parts get more worn. Front thigh should be totally water proof too.

The rest can be the usual breathing and waterproof fabric. But that already exists.
It should be widenable to allow for taking off without taking the shoes off. But that already exists.
It could inherit the idea from jackets, to have zippers in the arm pits, but on the back sides of the thighs.

When being in rain with glasses they often fog up or simply get water on them.

I suggest wipers; like car windshield wipers.

I have seen motorcycle gloves and with sammy and ski gloves with a plastic protrushion. That would only partly do.