http://youtube.com/watch?v=qAk45ftaMU0
Watch till the end, this looks pretty nice for a GBA title (nowadays anyway). Looks like a lot of work has gone into it unlike some other more recent GBA games.
The same developers are also bringing Crash of the Titans to the GBA, I hope it'll be as good as the first two GBA games.
And if you're one of those people who don't want anymore GBA games well...don't play them!