This past Summer Machinima and Hasbro combined their forces to bring the animated Transformers: Combiner Wars to digital streaming sites. Transformers: Combiner Wars was a multi-format (like Transformers themselves) storyline with its presence in toys, comics, games, and as animation. The toys and comics (which got trampled on a bit by Revolution) followed Combiner Wars up with the next chapter titled Titans Return, and its been announced that the animated mini series would follow suit.
Yes, the companies have begun development on the animated version of Titans Return. Ah but that's not all, all of this is part of something called the Prime Wars Trilogy, and the third part has also been named: Power of the Primes. The next two chapters continue the story:
… the follow-up installments center on the depleted forces of Cybertron and a broken Council of Worlds who must face off against a new threat larger than anything that has come before.
No timeframe has been announced for the next two chapters.