Dota2 version/mod for island defense?

There was a super fun mod for Starcraft 2 called "Island Defense" where each player picked a "builder" and 1 player picked a "Titan". The Titan's job was to kill all the builders, while the builder scurried around and gathered resources (wood, and gold from the goldmine in the middle of the map) to build a base to try and stop/kill the Titan. Each race for both sides had different abilities.

It was tons of fun, and I was wondering if anything like that exists (or could exist, I don't know much about the capabilities of the Dota2 custom map engine) in the Dota2 arcade. Anyone remember that mod and know of anything available or in the works? Would love to play it again.