Nope. You're both wrong.
IYH DID kick off the era of monthly WWE PPVS. The first one being after WM11.
WM 11
IYH 1
KOTR 95
IYH 2
Summerslam 95
IYH 3
IYH 4
Survivor Series 95
IYH 5
...and so on. (Not that I needed to refer to wicki, but read for yourself...