That kind of just sounds like a dapp porting it's functionality to Hive. There's nothing to stop a frontend from connecting to multiple blockchains. We usually call something like that interoperability.

There is no way to get around an Ethereum gas fee if you want the security of the Ethereum blockchain. However, if parts of your dapp required less security you could probably migrate those parts to other DPOS chains with free trx costs. It's an interesting thought.