User blog comment:Callofduty4/Black Ops 2 campaign demo, much info released/@comment-4300017-20120524010405/@comment-4716684-20120525160106

and you should also be able to upgrade the weapons damage, recoil

no, just no. That will lead to uber omega overpowered weapons with no recoil (like the thompson in CoD1), and won't make it more fun.