Well, declaring a novel part of canon is unlikely; generally the only times that happens are for tie-ins written or plotted by the showruneners themselves, like Jeri Taylor's Mosaic
, the Babylon 5
novels and comics outlined by J. Michael Straczynski, and the Joss Whedon-supervised comics continuations of the Buffyverse, Serenity
, and Dollhouse
But there's no reason a canonical work can't pick and choose elements from non-canonical tie-ins, like the way Enterprise
borrowed bits of Andorian worldbuilding from a gaming supplement, or the way the movies have canonized the novel-originated first names of Sulu, Uhura, and Kirk's parents.