Good morning everyone.
It's me again, I've been up and running again for a little while now and i think I've got something. well I relatively sure I've got something.
Valve has been leaking things items in their update movies.
we know this, intentional or otherwise isn't my business.
I just think i may have found what comes next for one class.
I submit to you a screen shot from steams website.

The shot is from the meet the Heavy movie.
right at the end.
do you see it?
lemme help you out.

I hope you can see it now.
Look at the scout.
That doesn't look like a scatter gun or a pistol, and I'm pretty sure that's not the right caliber for a bat.
Looks to me like the scout has a nice SMG to play with.
Weather or not this is a pure slip up on valves part or another hidden hint is still really a mystery until the Scout get his upgrade pack. Which if my theory is right won't be until they update the spy or sniper.
Support, Offense, Defense.
There's my prediction for the scout and for when it'll happen.