i would assume outside of the novels at some point harry would still have to be promoted -- also admirals do not seem to have thier own ships in the startrek universe . i couldnt imagine chocotay wanting to he seperated from seven . there is no reason sevn couldnt enter stsrfleet academy howver i seriously doubt that the idea would be of interest to the character. honestly the only one i cant see with a future with regular fleet would be torres: i do not really see paris as wanting to hang out in starfleet .whoch is y it made sense in the finale that he had quit it. torres also going into diplomacy makes a little more sense i mean just simply not in starfleet . i do not think they would have much use for torres as a starfleet engineer . i am still not sure how she becamse voyagers engineer less u derstanding od why seven never replaced her but whatevs : as faras resinong a commision any admiral could have re instated it as well as pardoning him so there is no reason to believe that at the very least after janeway was promoted she wouldnt have hooked him up