On Hadley's Hope, right before the Marines arrive, a gateway portal opens. Through it comes
5 Necromorph Infectors
50 Necromorph Slashers(3 of which are enhanced)
10 Necromorph Leapers(3 of which are enhanced)
3 Necromorph Brutes(1 of which is enhanced)
3 Necromorph Dividers
5 Necromorph Exploders
1 Necromorph Tormentor
5 Necromorph Stalkers
While there are the original 150 adult Soldier xenomorphs in the hive with the queen and eggs, in addition the xenomorphs get
4 Colossal Ravagers
2 Crushers
8 Boilers
3 Praeotrians
6 Spitters(half of which are rupture sub type)
Which are dropped in the hive.
As well, 25,000 people are dropped in between Hadley's and the AP for hosts for both sides.