Igadevil
Mr. Kamen Rider
Looking at those scans... If Tsukasa wasn't Dai-Shocker's leader, why was the DCD Dai-Shocker symbol still there?
I read through it again, and I had forgotten that he is called the "former Daishocker Leader", but this revelation comes from Bishum and Tsukasa seems completely unaware of it. He never tries to re-embrace it like in the movie.
According to Shinigami Decade's purpose was to enact the "All Rider Extermination Plan" and Shadow Moon states after the tournament that he has outlive his usefulness, so his "leader" role was always going to be temporary. He's just a weapon.
This manga version seems to have a much better Shadow Moon battle just due to the lack of Double stealing it, but, otherwise, I don't see how it improves the movie much.
I generally liked the movie (a lot, actually), but I think thematically the comic story is stronger in some ways, because it dumps some aspects of the series I wasn't fond of.
