I decided to take this gigantic hunk of fabric and turn it into a shirt that I might actually wear.
In short, I wanted to make it unrecognizable.
I think I did.
This garment has two cinched sections (on the back/sides), a corset back, a sweetheart neckline, and rouched shoulders and front.
Step 2: Cut some bits off
Cut off the sleeves.
Cut off the bottom hem.
That means the only original stitches left in this garment are the shoulder seams (and maybe side seams, if your shirt has those). You have a giant tank-top with a ridiculous neckline.
Even out that neckline so that, even though it's huge, it's a smooth edge; remove any weird pointy parts left over from cutting out graphics.