Why in the world do we need Kirk back in the 24th century? If not for the Nexus, he would've most likely been dead by the TNG era anyway. And it's not like there's any dearth of 23rd-century fiction featuring the character.
I also question the format. If you're going to bring Kirk back into the 24th-century novel continuity, is an eBook novella really
the best place to do that? The destruction of the Borg and the resurrection of Data merited entire trilogies; the return of Kirk, a character who is far more of a cultural touchstone than Data and the Borg combined, merits a footnote by comparison? From a marketing standpoint, returning Kirk in The Stuff of Dreams
makes no sense at all.