Well... It seems like they have gone for the ____ty resident evil apocalypse version of nemesis. i dont recall him having a gatling gun. Only remembered the iconic Rocket Launcher and his tentacles.
Otherwise, we can always say that this isn't Nemesis from RE3. I always thought that, with the knowledge of Mr X/Tyrant-103 was Mass produced, Nemesis prototype would have been more than just one.
especially as Nemesis was programmed specifically to kill S.T.A.R.S, which the only living members in Raccoon City was Jill Valentine and Brad Vickers.
Chris left Raccoon city, So did Rebecca, and Barry only came back in RE3 and picked up Jill and Carlos.
On a side note, do you consider that the Canon ending? Nicholai getting away and Barry picking them up at the end?