here is some reasons why it isnt
1. more clues clues poin towards the lighthouse as ascension
2. if that was the map wouldnt woods and mason have faced zombies at that cosmodrome in executive order
3.that person on youtube would said he went to treyarch and played the map pack is fake bcuz he stole those pictures he showed bcuz those were realised way before he made that vid.
4. d-block and 2 other ppl say they have played ascension ,which i believe,have gave a way better description of ascension they all described the map the same like sayn skorpions and m14 in main room which i belive is true bcuz it was scrapped from kino and five.
so try 2 prove me wrong :)