This article contains minor visual spoilers for Avengers Infinity War
With the first wave of Infinity War Legends already hitting stores, the second wave was partially announced at Toy Fair 2018 to contain comic book figures of Malkith and Black Knight, and MCU Movie figures of Ant-Man & Wasp.
From here a couple of companies started listing this 2nd wave for pre-order, listing the other two figures as Thor and Black Widow. The BAF was listed as Black Dwarf.
Hasbro has now confirmed the final two figures to indeed be Thor and Black Widow, as they appear in Infinity War. And the BAF is Black Dwarf - or rather Cull Obsidian and he is the movie version.
As a reminder of wave 1, images have also been revealed of these. The first wave includes comic book Taskmaster, Songbird and King Cobra. They are joined with MCU Infinity War figures of Captain America, Iron-Man, Spider-Man and Proxima Midnight. The figures include the parts to construct a BAF Thanos (MCU version).