Not yet an official announcement (which will have its own news posting when it the press releases are done by IDW), but the current IDW President has let it slip in an interview that he is looking forward to the Transformers reboot in 2019.
As noted at TFW, the October NYCC is probably the most likely venue for the official announcement, and teaser images for the new comic series... if it isn't starting in January (because the Diamond comic Previews for that month would be out at the end of September, spoiling the surprise).
But the new series shouldn't be starting too far into 2019, as we only have the crossover comic with Star Trek to tide us over after the current universe of stories ends in October, which itself would also be ending in December.