Ok, I went back and searched, found this and am kind of confused on Power Barrage, so let me get this straight with that feat and Super Strength:

If I were to put this feat on Shazam! and Black Adam (full points) and I hit someone with an object, I would technically have "used Super Strength" and would be allotted the extra attack after the first attack or is it just when they picked up the item that turn, or maybe coupled it with Unstoppable and busted a wall...can they HSS and get two attacks with Super Strength is what I am asking?

Power Barrage was errated in the last Player's Guide to make it clear that it will not work with Super Strength.

From the Player's Guide:

Thanks! That does it, the document I was looking at was older.