This is the fourth of the Seven Haftarot of Consolation, its calendar position again the reason it accompanies Parashah Shoftim, whose own material sets out the appointment of judges, kings and prophets, rather than any planned thematic overlap with Isaiah's vision of comfort and restoration.
A loose resonance is still worth naming: Shoftim is deeply concerned with legitimate authority and just process, judges appointed to render fair verdicts and kings restrained by specific limits on their own power, and this haftarah describes God's own justice finally being rendered on Israel's behalf, the cup of suffering passed instead to those who had wronged the nation, a form of cosmic justice answering the parashah's human scale concern with fair judgment.
The herald's announcement of peace, seen directly by watchmen rather than merely reported to them, also connects to the parashah's own concern with reliable testimony and eyewitness confirmation in legal proceedings, both texts placing weight on what can be directly seen and confirmed rather than accepted purely on report, even though one concerns courtroom procedure and the other a much larger act of national vindication.
The instruction that the people need not leave captivity in haste, since God will go both ahead of them and behind them, also offers a quiet contrast with the original Exodus itself, undertaken in genuine haste and urgency, suggesting a return conducted instead with dignity and full assurance of protection on every side.