I recently (an hour ago actually) won an auction for Fantastic Dizzy on the Mega Drive, and while googling it i came across http://www.fantasticdizzy.co.uk/
I havent actually played any dizzy games (yet) but im sure at least on person will be pleased to see his return :P
No word on a release date, and its being developed by the group that made fusion frenzy (yay) and frogger 2 (nay) so for those of you that didnt know- there ya go