I don't know man. I would probably need to be prepared to buy a new idevice. The jumps have to be timed so well that I can see myself throwing my iPhone in frustration. (oh and for the record I beat 1 and 2 back when I was a kid)
If they ported the DS version I would be all about it. That game was great but I never got around to finishing it, probably because parts were frustratingly hard.
There's more chance of Tecmo releasing Dead or Alive: Xtreme Beach Volleyball - iPhone Edition then Ninja Gaiden.