i wont miss any guns because i dont have favourites. gimme a gun and ill kill with it (even though i dont get many kills).
and what makes you so sure there wont be a p90?
The P90 was the definition of an amazing gun which looked like a handbag. Amazing to use though and I got alot of kills with it. If i'm honest, I miss the days when Call of Duty 4 was the game to play.
i will miss the g3 as i loved to noob tube in hardcore and really piss people off and i really dont like many other guns iron sights. but with infinity ward i know i will find a new weapon of choice and i will love it.