So for all of you who played the games, read the comics, and researched things, what weapons does Soundwave have?
Soundwave has in his arsenal one of the most powerful weapons you can have: information and the ability to intercept, alter, withhold or even destroy it. He is also above the Earth which means he could take care of the Autobots and the US Military by just grabbing any passing big rocks and hurling them downwards.
Wasn't there some concept art somewhere that had Soundwave with sonic attacks and windows shattering around him. I know it didn't end up getting used in the second film but it might be an indication that the production team has been mess with the idea of what they could do for sonic based weapons.
In the Revenge of the Fallen video game's DLC pack that he was included in, he had a laser assault rifle of sorts (that slowed down enemies with consecutive hits) then a cannon that he could charge up and fire in a blast.