Hasbro have fully revealed the content of the next Marvel Legend X-Men wave, from which you will be able to collect and assemble Warlock as the BAF.
The wave is made up of a classic X-Men suit Cyclops. Dazzler, Polaris, Shatterstar and Sunfire make up the next 4 figures in the 7 figure series, arguably the least desireable figures. Wolverine, or rather Old Man Logan, is comic book based but is obviously included to take advantage of the Old Man Logan focus in Spring with the Fox release of Logan at the Cinema. The odd thing about Logan is the the exclusion of any accessories or BAF piece, meaning you can skip him and still build the Warlock BAF. The final figure is Colossus, who is sporting quite an unusual costume, particularly that neck piece. He will come with an alternative "metal" bearded head.
The BAF is Warlock, who once assembled can be posed with normal fist or circular saw hand weapon.