"Shall" is also subjunctive, meaning "let it be so".
The meek shall inherit the earth == All you aggro nations r gonna get pwned.
The madness shall be pushed back into the sea == Dude, we're gonna go pwn some crazy starspawn.
So, Kadelake, you were correct to use "shall." And I promise I'll depart this thread now.
If anyone wants to continue discussing "shall", let's head to the Bar & Grill.