Board Thread:Spoilers!/@comment-25375217-20180117025415/@comment-5895297-20180117144447

While I won't expect anything I hope for one or two special references at least or a guest appearance from someone of the earlier seasons.

Charmed for example brought Cole back for the 150th episode and Desperate Housewives referenced the Pilot in a very specific way in theirs. So there is definitely a possibilty, especially if the writers have in mind that it could be their last "milestone" before the series finale.