Just watched Gurren-Lagann's movie a while ago. It's pretty good and stands on its own even if it lacks a lot of Kamina's development. The first half is like a quick summary. Instead of giving us Kamina being angry at Rossiu's village elder or Kamina discovering his father is dead, we're just given a quick montage of the gang meeting Rossiu and Kittan. The cut after the montage is Lordgenome, who explains what is happening with the Big Four and sets the stage for the decisive battle with Thymilph to subjugate the humans. Kamina’s death is almost entirely the same footage, but without all the incumbent emotions it comes off as a lot of action, shouting and posing for cool shots.

Still, the second half of the film is awesome and almost completely new. There are no more montages and no more eye catches, just pure, fluid, full animation. The real shift in style and content comes after Simon retreats into himself after the loss of Kamina. Plenty of powerful sequences like Simon punching Rossiu for taking lightly Kamina's memory, the re-animated and now eerily beautiful first meeting between Simon and Nia and the entire depressed Simon boiled down to a and an three-way heart to heart conversation about Kamina and Lordgenome between Simon, Nia and Yoko in the depressed Simon’s cave-like room with the Kamina statues, set the stage for a great final conflict.