We had already had confirmation of a Black Panther MCU 2-pack arriving later in 2018 containing an Everett Ross figure and a repack of Killmonger, now with the Michael B. Jordan head. We had also seen a leaked photo of this box set with packaging that seemed to read "Stan Lee BAF".
This has now been confirmed by these images which show the Stan Lee figure. We had originally thought the BAF would be across 3 packs, but it seems only two of them are involved - the Black Panther set, and the one including a repacked Falcon and the new Winter Soldier / White Wolf. The rumoured Dr Strange & Iron-Man 2-pack is actually a 3 pack with Thanos in the Best of MCU 10th anniversary line.
These images have been circulated heavily so we don't know the original source.