Warbler said:
Does anyone else here agree with me that it would have made more sense for John Blake's real name to be Terry McGinnis instead of Robin?
Yes. I believe they didn't use it because most people would kind of go "what? who?" By having his name be Robin it makes it clear to the majority of the audience that he will follow Batman. I actually wished he was referred to as Terry McGinnis throughout the film (I love Batman Beyond) but it would have given everything away. Shame.