S250 has updated his blog with a teaser of a rumour regarding some more Transformers Animated season 3 characters. S250 reports that these characters closely resemble their original G1 counterparts. The information he has given is that the names of the characters are A**** T**** and D** A****.
The most likey candidates are Alpha Trion or Astro Train (more unlikely as the character has been used in Transformers Universe) and Dai Atlas (the Japanese Micromaster commander).