It's brought back
the character introduced in the Marvel NOW! Captain America relaunch back in 2012, the one last seen in the pre-Secret Wars All-New Captain America (and the Secret Wars mini Hail Hydra).
The first arc of Symbol of Truth'd had Sam working with
Joaquín Torres, the Falcon introduced in the post-Secret Wars Captain America: Sam Wilson. The two of them'd grappled with a wide-spanning scheme, foiled a bioterrorist plot being set up in Wakanda - and dealt with
the consequences of that.
The second arc, starting in issue #6, followed on the heels of that - it had Sam and Joaquín in New York, where the prime minister of Mohannda (
geographical neighbor of Wakanda, introduced in the 90s Marvel UK series Black Axe) was asking for aid at the United Nations in her plans of reform.
Afterwards, Sam was walking the prime minister out, checking in with Joaquín: " Falcon. Sitrep. "
" All friendlies as far as I can see. Crowd's been checked too. "
( Sam was uneasy. )