Tengen Toppa Gurren-Lagann

-Lagann-hen's final battle is sort of a festival.
-Regarding the ending: Imaishi still thinks the original ending was not a failure. They certainly heard many, many people saying that they were expecting a happier ending, but Imaishi thinks that changing the ending on the movie wouldn't have been very manly of them. Instead, they added more explanation on what lead Nia to accept her death and Simon to grant her said wish.
-There is a more conscious effort into creating a clear parallel between Simon and Lord Genome. Simon's humiliation while he is in prison leaves a stronger impression.
-Many of the scenes they had originally planned for the TV shows but were cut for visual concerns were brought back to animation in another way with the movie.
-They decided to add nipples because they realized that if they didn't Gurren-Lagann would have been the only Gainax mecha anime that didn't featured them.
-They feel very proud about the newly animated scenes; they're very cinematic and intense. Examples of some stand-outs:
--Shouko Nakamura's Simon's spiral blood
--Hiroki Mutaguchi's GaoGaiGar-like animation for Cathedral Lazengann and Choi Ginga Gurren-Lagann
--The brutal scene in which Gran Zeboma tears TTGL apart came out much better than expected, it has a very gruesome feel and creates a powerful impression.
--Solvernia's action sequence is a very, very special thing. Animator Kenichi Yoshida, as a veteran Ghibli animator, works very differently from your usual mechanic animator, so the scene feels very fresh and full of life. It's one of the best scenes in the film, Imaishi says.
--Yoshinari animated Super Tengen Toppa and Super Gran Zeboma directly on the spot, without preliminary designs of any kind.