“And the coastland will be for the remnant of the house of Judah.” This is a prophecy of the restoration of the land for the tribes of Judah. Ezekiel 47 and 48 show a much more complete picture of Israel in the Millennial Kingdom. In Christ’s future Millennial Kingdom on earth, the tribes of Israel will be restored and given territory. The west boundary of the tribes of Israel will be the Mediterranean Sea (Ezek. 47:20). The “house of Judah” in this context refers not just to the tribe of Judah, but the tribes of the Kingdom of Judah, and in the prophecy of Ezekiel, given some decades later, the area of the tribes of Judah, Benjamin, and Simeon did indeed stretch westward to the Mediterranean Sea and thus cover the area where the chief Philistine cities had been located (Ezek. 48:7, 24, 25).
“restore their fortunes.” The Hebrew text may be read as “restore their fortunes” (HCSB, ESV, NASB, NIV) or “return their captivity” (ASV, DBY, JPS, KJV), depending on which way the Hebrew text is vowel pointed. However, in the original Hebrew text which had no modern vowel pointing, the phrase could be naturally read both ways and is an amphibologia, a double entendre, in which both meanings are equally true. God will visit Judah and end their captivity and restore their fortunes.