An Easter egg involving clothing in the GTA VI launch trailer has sparked speculation that Jason and Lucia may have known each other for a long time. The trailer also provided some details about Jason's past, confirming that he served in the military and left under unfavorable circumstances.
In the scene where Jason and Lucia are playfully sitting on the hood of a car, players noticed that Jason's shirt comes from the "Fort Baxter Air Base" combat training school. "Fort Baxter" was a location in the Vice City district of the original GTA, with Vice City widely believed to be modeled after Miami, Florida (though often associated with the broader East Coast setting including areas like New Jersey in fan theories). This detail could be either Rockstar's nod to the series' early works or related to Jason's military background.
Lucia has previously been confirmed to be from Liberty City, which is geographically close to Vice City. Given this connection, some players speculate that Jason may have received military combat training in Vice City and met Lucia there or even earlier. If this speculation holds true, the shared history between the two protagonists could extend further back than currently revealed.
However, current information is insufficient to prove that this shirt serves as a plot hint, nor can it confirm the exact time when Jason and Lucia met. What can be confirmed so far includes the clothing logo, Jason's military service and his dishonorable discharge, as well as Lucia's origin from Liberty City; the claim that the two had interactions in their early years remains an interpretation by players based on Easter eggs and geographical connections.