When? In a year? And now he is two spots removed from commanding a starship? Fine. Stick him as a medical officer, an engineering or science officer. Oh wait, he's not any of those? He's a command level officer two spots from command of the Enterprise?
That's why I said right now. It's true that we don't know what the actual cast of Legacy might be (or even if Legacy will actually happen despite all the heavy expectation), but we can only go with what we currently have.
According to one site, Jack Crusher is serving as Seven's "special counselor". So, which is it? Second Officer or "Special Counselor"? Starfleet now has an "accelerated program"? Why? It's not like the setting is in some far-off place like the Delta Quadrant.
Matalas mentioned Jack would be the Second Officer if a Legacy show gets off the ground. As of the end of PIC3 he's just a "a special counselor".
Special Counselor. Only the OP suggested that Jack be second officer. Not even Matalas has, at least not in his initial reddit post. I think Starfleet always has had an accelerated program. It may be the equivalent of Officer Candidate School, more or less.
Unless things have changed since the initial reddit post. That one merely suggested a situation in which Jack would have to take or be left with the conn, but you don't have to be second officer to do that if it's just briefly.
He has a ton of life experiences and Seven has a specific plans for him and his uniqie talents/capablities.
What does a Second Officer do? IMHC, Starfleet has tasked Enterprise with protecting Jack from the Borg -- and they had to put him SOMEWHERE. Chakotay is staying on Prodigy (right alongside Janeway). Does Terry want to kill off Raffi and make Jack the XO? That's what's always concerned me about that whole scenario. I feel somewhat better now. Borg?
Generally be third in command and fill in when the first officer is away or busy. They gave two ex-Borg command of Enterprises.
No, life experiences, talent, and connections to contacts outside of the federation, and freaking superpowers.
In any hierarchical system. I wouldn't take him as a supervisor in my agency without ar least two years experience.