Just read up to issue #100, yeah man it has certainly gotten dark. I liked Jennika’s set up, was done very well, and warmed up a lot to her character, but did not like how they wrote splinter’s fate. Felt there was more needed, maybe I’ll find it in the later issues, believe they are up to 107 or 108 now. Also felt with City at War, there was a lot of stuff that was going on, too much at one time, with enemies coming from all different angles. I felt the Invasion of the Triceratons and Trial of Krang stories were a little more straight forward. But I guess for issue 100 they wanted to throw everything into Disarray and truly blow things up.
Anyway, I read up to Book 4 of Usagi Yojimbo. It is excellent. One character who is really cool is Gen, The Rhino Bounty hunter ronin, who you may recall seeing in the 2003 series. Totally recommend you pick it up, can get the books on kindle or paperback on amazon.