@Angevil: YOu didin't even play it, but luckily, you are almost alone.
I would like to see the 1999 game of course but I just can't recall any saga that had survived with two simultaneous self-contradicting timelines 
Well, there's Final Fantasy, where every game is kind of its own world with only a few ties between them.
And there's Mega Man, which has six or seven different series across two timelines, three or four of which contradict each other in myriad ways in spite of being part of the same timeline, quite a feat. (Dear God, some of the things in the X and Zero games are hilariously contradictory. It's why I ignore the plot by and large.) And Mega Man holds (I think) the world record for the most entries in a single game series.
So I don't think the timeline will have anything to do with Castlevania's success. If it did, it'd be waaaay screwed by now.