The Unboxing Toy Convention takes place this weekend in Mexico City.
At SDCC, Hasbro indicated they have more reveals to make at this event. This was mentioned specifically in both their Star Wars and Marvel Panel at SDCC.
The Unboxing Toy Convention opens at 10am in Mexico, so we would expect the first news from 4pm on Saturday here in the UK
The Hasbro Panel is scheduled for 4.30pm (10.30pm UK) on Saturday the 4th.