With February being the traditionally exciting Sith month and the release timing of characters that compose squads that help with hero journeys, my thoughts wander to when Darth Malak will be released...
It's related to Revan because it's a triple zeta leader that is leading sith. GG won't have 3 zetas and has no sith synergy, so the only logical explanation is a new sith leader who will likely come in the form of another Journey event, as the only way we've gotten triple zeta characters has been through journeys. Revan comes in because he and Malak are the only characters that the recently farmable marquees are related to.