15 episodes. The first season will have 15 episodes. Or maybe 16. The 16th one will be more both a conclusion to season 1 and an introduction to season 2 than being really part of the 1st season. So let’s go with 15 episodes (so yes, if you count right, just oneleft before the end!)

Though I plan to divide season 1 into 2 parts : episodes 1 to 3 into a ‘pre-season 1’ chapter and episodes 4 to 15 as the season 1 itself.

At least 2 seasons.

I have plans for 3.
But we shall see if there’re still readers until then and if I’m still motivated and not engrossed in another project when time of season 3 comes.

But there will be 2 seasons at least, that’s for sure. As you’ll see (very soon I hope), season 1 will end with still a lot to be answered…

I can’t say for sure.
Not every character of the verse will make his own appearance, but some might. It’s not even decided yet I guess.