With the years it took to get the Pro-V line in amber, I wouldn't expect a tour caliber product anytime soon. Velocity had several new colors in the last cycle - maybe something will change in the release due in January at the PGA. To note, it didn't take Bubba long to come back to the X (now in amber) after a year of using pink balls.
Titleist won't be chasing other companies for niche products. I don't expect to see mini-soccer balls anytime soon, either.