Takara Tomy is holding a panel at Tokyo Toy Show 2018 right now, and Masterpiece Convoy (Optimus Prime) V3 has been confirmed! TFW2005 member Gamerlingual is there and shared some pics from the event, though they are from a distance.

Courtesy of @portarmy on Twitter who is there:

Masterpiece Convoy V3 confirmed

Slender legs

Sounds from the show (Japanese)

Same size as MP-10

BIG rifle

Releases 2019

Beast Wars Megatron colors still in progress.

Golden Lagoon figures in the works (more details soon).

Update, more pics from Toy-People and Frenz added!

Update again, pic from Sam showing full body!