Thanks. The first picture is where the old shower resided. My original plan was to just tear out the old tile and keep the framing, but the more I tore out, the more rot I found.
The brick on the exterior was actually holding up this wall. The sill plate was completely gone. The studs were floating, just hanging on to the brick tabs. I also doubled up the floor joists there and put in some scabs. It's hard to tell that half of the bathroom is pier and beam. It's solid.
Everything works great although I did make one mistake. I was in a rush, thanks to my wife, when I was installing the toilet flange. I cemented the dang thing in and realized I aligned the bolt cutouts square to the wall instead of rotating them. So the only way I could mount the toilet was at an angle. I hate making mistakes.. Anyhow, after I tried one of those flange replacement pieces and didn't like how it raised the toilet, I found a way to get a couple of washers under the flange so they would hold the bolts down where they should be.