I highly doubt that. I think that one reason Kadaj could become Sephiroth was beacause of his will power to ultimatly become Sephiroth. Cloud has no desire to become anything to do with Sephiroth. Plus ALL SOLDIERs had Jenova cells put in them, but not as many as Kadaj,Laus and Hazoo, because they basically came straight from Jenova herself.