Entertainment Weekly has released even more stills from ANT-MAN, one of which offers us a better look at the Yellowjacket costume!
I'll scan the entire article in Entertainment Weekly and post it on the blog over the weekend.
Going off of when the teaser trailer for AGE OF ULTRON was released and when the first full trailer was released, I'd guess that we'll get a full ANT-MAN trailer by the end of the month or the beginning of February. This is just me speculating, though.
Source: Entertainment Weekly.