what i would define as a viable bitcoin 2.0 is where the blockchain holds the bitcoin genesis block of 2009 as designed and created by the pseudonym Satoshi, and all blocks thereafter.... but where the protocol has evolved to such an extent that the protocol is unrecognizable compared to bitcoin 0.1 and the features and benefits are evolved to not be the same as bitcoin 0.1

at the moment the changes to the protocol only amount to 0.9 so a bitcoin 2.0 is far far far away from happening any time soon.

in short if it does not have the bitcoins genesis block in it. its not any version of bitcoin at all