The Titanium Series Ark is actually based on a Y-Wing from Star Wars, only they changed the wings and the cockpit is actually what the Ark looked like in the G1 cartoon (everything behind there is the body of a Y-Wing). You can even see the head of the Astromech droid sticking up the top! It's _not_ the body of the Autobot shuttles seen in Transformers the Movie either.
Here are some images for comparison:
Titanium Series Autobot Ark
Y-Wing
The Ark
Autobot shuttle
So if you want to make a Robot Heroes Ark that resembles the Titanium Series Ark, just go get a Galactic Heroes Y-Wing (have they made one?) and repaint it! That's pretty much what Hasbro did!![]()
It's just a shame that Hasbro appears to have decided to discontinue the Robot Heroes line...
They've been fun and I would have totally been up for an Ark playset.