Option #2: Re-sign Rhys Hoskins
It truly was crushing to see Rhys Hoskins go down with the injury he was forced to deal with at the time it happened. Hoskins was not only trying to help the Phillies win the World Series, but he was trying to get himself paid as he was entering a contract year. Now, he's likely going to search for a one or two-year deal to prove himself once again as a solid first baseman.
Whether Hoskins will get that chance to return to Philadelphia and hopefully finish with a better ending remains to be seen. I know he'd like to come back, but the Phillies have no reason to be desperate to bring him back. They have one of the best lineups in baseball whether he's there or not, and Harper probably isn't much worse defensively, if at all. Hoskins often left a lot to be desired in the field.
Hoskins' ability to get on base at the level he does and hit for as much power as he does will make him a popular free agent target for many teams trying to compete. He can play both first base and DH, and won't come super cheap.
The Phillies have many other areas to address, especially if Harper is comfortable enough to remain at first base. It's not an impossibility that the team brings him back, and I'm sure all parties involved would be happy if a deal came to fruition, but if Harper is willing to remain at first base, it wouldn't be shocking at all to see Hoskins walk.