There is a company called Phonetic Arts, and they've created this cool speech synthesis technology that creates continuous commentary from using a voice recording (although it's more complicated than that). There were videos of it on the web, but since Google bought them, they've all disappeared and Phonetic Arts has pretty much disappeared with them in terms of visibility. However, I have a hunch that a similar simpler type of technology could be done just by having some kind of tool that manipulates speech, maybe being able to manipulate each word in a typed sentenced in addition to being able to manipulate the entire sentence.
So, I was using the text-to-speech object in Construct the other day and was wondering if it would be possible for a plugin to be made that could manipulate the tone, inflection, depth and speed of the speech voice? Right now, I think the object is nice, but being able to shape the voice would be make it incredibly useful for RPG/Drama games and would be huge for sports game that require play-by-play commentary. This way, you could make all kinds of voices to give your games a more professional edge and you wouldn't have to load your game up with a bunch of external audio files.