A new coin pretending to be IncaKoin, with an entirely new blockchain obviously won't be the same coin. It will be code copied from other coins, started from scratch, with a genesis block. Then you will premine all of the coins to swap. It will be a new algorithm, only the name will remain the same.

Imagine the goverment swapped bitcoin's blockchain with a premined fedcoin you have to sign up with you biometrics, and merely called it "Bitcoin".
Would it still be Bitcoin? No. It would be a centralized premined shitcoin like they always make.

PS If anyone who was sold IncaKoin paper wallets is going to be looking for someone, It won't be me they are looking for!! LOL