With Drift confirmed as a samurai autobot and mentioned to speak Mandarin, these are the guys that are most likely to voice him
Will Yun Lee
Jackie Chan
Russel Wong
or
Jet Li
feel free to decide on which of these actors is Bay is willing to have cast as the voice of this blue samurai autobot or anyone who isn't on this page but remember the actor to voice him has to be Asian and is capable of speaking Mandarin and be sure to stay tuned for more trailers on the fourth movie before it arrives in theaters June 27th
Remember this is just speculation, not news