Draw the floor plan as it will be with walls . Are you keeping the angled wall? A to scale plan is what we need showing te rough in fot the toilet and the sink and shower.Use graph paper , post here in a comment DO NOT start another post.Also helpful to at least name the areas outside the bathroom

Of course you want to use the existing toilet rough in. It looks like it is 24" from the rough in to the side wall, so you could start the shower 24" from the rough in on the other side. 48" of space for a toilet is generous, and unnecessary, but if you don't center it, it may never look right. The shower drain looks like it is in an odd place. Do you think it was intended for a sink instead of a shower? The smallest shower that is useable is 36" square. 36" X 48" is much better. I think if I were you I would get a plumber to come out to tell you what is possible. Is the rest of the basement finished, or are you going to be finishing it as part of this project?

Hi thanks for the reply. The entire basement is somewhat unfinished. I am going to frame walls just the perimeter walls and leave it mainly opened. Here is another pic where i framed some walls to give me an idea on how it would look. As for the shower drain im still confused on why the builder picked that location. You will see from the picture how i layed everything out. Im not to crazy about it but i dont think there are other options unless i bust up the concrete to relocate the drain. The area behind the shower not sure what to do with that besides a little closet. Also i dont think the drain was meant for a sink as that is too far from the wall. I have another pipe in the opposite wall towards the corner of the house that was sticking out of the ground as well. I ended up capping it as i made a little turf field in that area.