Who is due back when? I think Polanco comes back first, yes? Then I'd put him at 3rd, Wallner goes down. (Whether or not anyone wants that to happen is beside the point ... that is the likely move, since he came up when Miranda was put on the IL). Hopefully there are some trades in the mean time, before the others.
When Royce comes back, Royce is at 3rd and Polanco moves back to 2nd. Not sure what the corresponding move will be, but perhaps someone is traded or released (Solano?) But in the off-season, I work on getting Royce to the OF, leaving 3B for Lee.
But I don't think we will see Lee this year, unless there are a ton of injuries. He isn't even in AAA yet. But I would move him up, just in case.
What happens to Julien when Polanco and Royce are back up? There will be some rotating in and out and around. And it will depend on the 'elephant in the room' question that I won't get into here because it's been gotten into in every thread.
My question is what happens to Miranda? And that all depends on him, but he may end up being shut down for the rest of the year. After that? <shrug>
We do have kind of an on-going thread that much of this gets discussed from time to time, if you are interested to read some of the comments there. It can be nice to start fresh, though, so thanks for starting this.