One way or the other, we´ll get that decision pretty soon. Two weeks till the Bundesliga starts again, and Goretzka said he´ll make his decision in early January. Schalke simply has to consider whether it makes sense to sell him for say €20-25M right now, or keep him for their own CL spots push, that will result in similar financial returns, if successful.
At the same time Goretzka has to decide whether a move now hurts or helps his World Cup chances. I think he´s a squad lock, but this is Germany.
For Bayern, Barcelona, Juventus or Liverpool he´s obviously attractive now, cause he´s still CL eligible.