
Originally Posted by
Preypacer
As a new 2.0 character, you are starting out fresh. You are a new adventurer, first arriving to your chosen city and taking your first steps toward fame and fortune. You have the potential to become a hero, but you are not one yet. Your character certainly existed during 1.0 (unless everyone's born full-grown somehow), but you were not part of the events of fighting the Garleans, defeating Van Darnus or attempting to stop Dalamud. Your character would have been like others in the world who existed, but weren't directly involved in the conflict. During the events of 1.x, future 2.0 characters would have been off elsewhere, doing other things, living their pre-Adventurer lives. This is all pretty well implied by the way a 2.0 character is introduced to the game/world. Thus, they would not have the Mark, because they were not a part of any of the events that it symbolizes.
Conversely, 1.0 players are returning to Eorzea. They were involved with the conflict. They did do their part - to whatever extent - to try and stop the Garleans and otherwise forestall the events that ultimately took place. Symbolically (ie. even if the player wasn't actually logged in during the events), they were there on the Carteneau flats when the shit hit the fan and were ported away by Louisoix. Thus, upon returning to Eorzea with 2.0, they had the mark. That you've returned to Eorzea and aren't just arriving also plays out in all the "you look familiar" bits, that your name is already in the ledger at your chosen Adventurer's Guild, etc. People may not remember you, due to the kind of "amnesia"... but you were one of the heroes they are all straining to remember nonetheless.