I think vitalik won't allow it to happen so we are not going to get "classic" versions of erc20 tokens.
Anyways if it ever happens I am sure token creaters wll announce that they are going with new ethereum..
LOL,vitalik is pro-forks because if he isnt he wont be existing and ethereum too as far as i know ETC or ethereum classic team are the ones who wont allow to have forks in ethereum's chain back then,but the original forks has split into two which is now the ETHEREUM which vitalik has and ETHEREUM CLASSIC with the people who doesnt want to have fork in the original chain.