Every saga has it's homages to past characters and situations, but recently, there seem to be A LOT of them at once. Lizardon came back with a complete flash back episode, as well as a reminder of Kanto's starters that inspired it, there are hints that Satoshi's Butterfree may be coming back, Ibuki, a Jouto gym leader is appearing seemingly out of nowhere...what could all of this be working towards, if anything?
A lot of these characters and situations occurred 10+ years ago. Why bring them back all of the sudden? Is this leading to some sort of master plan or build up to something?