Board Thread:Spoilers!/@comment-26443838-20160111023755/@comment-1916997-20160319173910

DarKingdomHearts wrote: The thing I'm mainly interested about is what the flashbacks will bring to the table. It may be a flashback to Hook and Liam still being in the Royal Navy and encounter Silver. I don't know what else could even be it.

Unless they are going to exclude Liam from the flashback and it will only focus on Hook already in his pirating days. (personally I want flashbacks of Hook being in Neverland, but we'll probably not get that anytime soon...) I doubt they are bringing Liam's actor back for an episode and not having him in the flashback, so your first guess is probably correct.