Spinosaurus sail shape
I have finally got back around to working on a new Spinosaurus skeletal from scratch. I'm exploring some of the issues on my website, including a critical look at the new sail shape everyone seems keen on copying. Check it out here: https://www.skeletaldrawing.com/home/the-road-to-spinosaurus-ii-known-unknowns11252020
Revised Spinosaurus skeletal
Not agreeing may be a bit strong because I have no real firm opinion on the matter, as Spinosaurus and kin need more research, but I felt that calling Ibrahim's crest shape as speculative seemed a bit much, as I felt there is enough overlap to assess at least part of their reasoning behind that shape as solid. But again, I am in no authority to contradict your conclusions in the current state of knowledge nor do I wish to. ^^
"Speculative" is a lot nicer than "wrong." But it truly is speculative, there is no data from either the FSAC specimen or the type to justify the M-shaped sail. Which doesn't mean it's impossible, just that it's all paleoart-meme at this stage.