It seems that Diego actually be a young Vaas from Far Cry 3. It's looking more and more likely due to theories and a hint made by Vaas' voice actor Michael Mando . IGN journalist Joe Skrebels posted an image on Twitter comparing both characters, specifically focusing on a scar, see below.
Vaas should have reemerged as the true final boss after Hoyt. Instead, we get a final boss fight with Hoyt amounting to nothing more than a quick-time event! I waited with anticipation to see Vaas, or to see some semblance of a true final boss fight. I'm still waiting. When the developers make their Farcry 3 expansion. Vaas better be in it.

voiced by Michelle Arvizu. Sean McKay. voiced by Rick Roberts. Rosa Mel Paquete. voiced by Nicky Nasrallah. Julio Velez. voiced by Michael Reventar. General Sanchez. voiced by Noam Jenkins.

November 16, 2021. Far Cry 6 ’s first DLC episode is out now, taking you deep into the twisted mind of one of Far Cry’s most infamous and enigmatic villains: Far Cry 3 ’s Vaas Montenegro. In Vaas: Insanity, available now for Xbox One and Xbox Series X|S, you’ll play as the unstable pirate (voiced by original Vaas actor Michael Mando) as

We awarded the original Far Cry 3 release a 9/10 review, with a lot of praise centred on the manic, unpredictable performance that created Vaas - in fact we said the game's "fantastic performances are among the best acting in video games". We certainly wouldn't complain about another opportunity to be frightened by Vaas. For Far Cry 3 on the Xbox 360, a GameFAQs message board topic titled "Vaas voice actor is just amazing". Pfcf1T. 192 121 148 201 346 323 0 196 225

far cry 3 vaas voice actor