in general the 2nd film is usually always the best of the series (with a couple of exceptions)...heres some evidence 
Superman 2
Empires Strikes Back
Godfather 2
Aliens
The Dark Knight (only just edges out the first)
Star Trek 2: Wrath of Khan
Spiderman 2
Terminator 2
Mad Max 2
Captain America Winter Soldier
LOTR: The Two Towers
Rocky 2
Beverly Hills Cop 2
Evil Dead 2
All better than the 1st and indeed best of entire series i daresay. Theres something about being the 2nd film that adds a certain je ne sais quo.
A few exceptions stuff like Raiders of the Lost Ark (1st one stands alone), Ghostbusters, The Matrix, Highlander, Die Hard but you get my drift.
dems the unwritten laws of film making.

Superman 2
Empires Strikes Back
Godfather 2
Aliens
The Dark Knight (only just edges out the first)
Star Trek 2: Wrath of Khan
Spiderman 2
Terminator 2
Mad Max 2
Captain America Winter Soldier
LOTR: The Two Towers
Rocky 2
Beverly Hills Cop 2
Evil Dead 2
All better than the 1st and indeed best of entire series i daresay. Theres something about being the 2nd film that adds a certain je ne sais quo.
A few exceptions stuff like Raiders of the Lost Ark (1st one stands alone), Ghostbusters, The Matrix, Highlander, Die Hard but you get my drift.
dems the unwritten laws of film making.