A new discovery appears to link Uncharted 4: A Thief's End to The Last of Us 2 in an intriguing way.
In a post on The Last of Us sub reddit, user kheinrichs547 spotted that in Uncharted 4, you can find a pill bottle from Weston's Pharmacy - the same pharmacy that's seen in The Last of Us 2.
In the comments section underneath the original post on the subreddit, there are additional details about the pharmacy. It turns out that Weston's is actually present in Left Behind, the story DLC for the original Last of Us which starred Ellie and Riley. The pair explore this store in the mall that they escape to in the DLC.