Planning an animation project is similar to planning a video production project but has it's own set of challenges and some real advantages too.
Firstly, animation can open up a lot of possibilities visually, since everything will be produced via illustration and CGI. Things like locations and props which can often be prohibitive in video production are not really an issue when it comes to planning an animation.
But, choosing a style of animation can be tricky. Some projects work well with one style whereas they don't work with others - so paying considerable attention to this early on is important as it ulitimately informs all of the next steps.