This was another idea I've always wanted to get drawn, and surprisingly only feral Rexes have ever been cybernetically enhanced.
On a distant primitive world, one of the few in the galaxy where Dinosaurs were the ruling species, one tribe of Tyrannosaurus Rexes had a very intimidating reputation. The reason for that was these two, twin Rexes born into the tribe who became the strongest in the world, devoted to protecting their people and their territory. The female was born white and the male born black, something the mystics believed to be a mark of destiny. For years they hunted and fought, driving away all who would invaded their territory yet allowed those worthy of trade to enter. Until one fateful day where a rival tribe attacked, using weapons that had come from the stars and destroyed nearly everything they had. Both warriors were near death, the male more so than the female, but the owners of said weapons came to get back their property and found two new test subjects instead.
The same company that created Zada now gave a powerful and violent species cybernetic enhancements, increasing their already impressive strength and weaponizing them. At first, both were grateful to be alive and relished their new lease on life, until the day came that a combat test pitted them against each other. The brother won, but when a careless spectator mentioned they had hoped one would kill the other the destruction that ensued was so great they had to keep the Rexes in stasis until they could be disassembled. Until the breakout that freed them along with Zada and one other cyborg. Now they fight for the special branch in the Alliance, but many have come to fear code names King and Queen, The Terrible Tyrant Twins.