3D project

Oh My God,I've totally lost in my 3D latest project,deconstruction and reconstruction

I'm directionless,but luckily I still have sufficient time for me to plan what to do with this project.Teacher ask us to sketch at least 5 sketches then only we choose one from there as our final decision.
My first sketch,is a grave,and the scene of the dead revive with a opposite cross,seems like a bit creepy,but I really like it.
And the second,is a simple high-cut sneakers.
The third is one of  my favorite super hero's armor,the shield of Captain America.
Fourth,is an action of a human body,but I don't think I'm going to do this,its quite complicated.
And the last one is just a guitar,simple one.