https://www.pcgamer.com/sam-fisher-joins-ghost-recon-wildlands-for-special-operation-1/

Ubisoft has confirmed that Splinter Cell superhero Sam Fisher—voiced by original voice actor Michael Ironside, or someone who sounds an awful lot like him—is coming to Ghost Recon Wildlands in a special "crossover event" that's coming as part of the Special Operation 1, the first of four major updates planned for the game's second year. The Ghosts are assigned to back up Fisher's mission to recover material stolen from Langley—and, I would imagine, deliver some very bad news to the rogue CIA agent who's trying to sell it to the Santa Blanca cartel. 

The new PvE mission will be playable solo or co-op in teams of up to four, and will offer exclusive rewards including Fisher's famous goggles for players who complete it prior to the end of the challenge period. That's the catch—the mission will be available permanently, but the rewards will only be on offer until May 16.