So, I've been thinking about this...20+ likely means 21 or 22 new weapons. I decided to list all the known new weapons. Some of these are just old weapons with new names (Crytek marketing :p).

- Five alien weapons + the Swarmer
- Scar & Scarab Mod 2
- Alpha Jackal
- Majestic Six
- Hammer II
- Typhoon
- The bow
- New EMP grenade

That's 14. Since the Mk60, DSG, Marshall, FY71, Gauss, JAW, AY69 and M12 Nova have the old names, Crytek can't call them new weapons. That leaves the Mike, Grendel, K-Volt, C4 and L-TAG (:p) as possible re-namings (is that even a word?). Which in turn means that there has to be at least two new weapons. And since we would burn down Crytek's office if the L-TAG was in the game, we can call it three. Oh, and if Crytek calls the shields and lamp posts "weapons", I will sue them.