"For to us a child is born, to us a son is given, and the government will be on his shoulders. And he will be called Wonderful, Counselor, Mighty God, Everlasting Father, Prince of Peace." NIV translation
When Jesus returns, this prophecy will be fulfilled. The name Wonderful actually comes from the Greek word which means secret. The whole world will look to Him at that time for knowledge and will acknowledge Him as the Son of God and Creator of the world. Finally, there will be peace on the earth.
"Of the increase of his government and peace there will be no end. He will reign on David's throne and over his kingdom, establishing and upholding it with justice and righteousness from that time on and forever. The zeal of the Lord Almighty will accomplish this." NIV translation
Jesus will reign over the Jews (David's kingdom) when He returns and the nation will have true unending peace. It will be obvious to everyone that it is the Lord Almighty that has done it and He will be glorified.
"The Lord has sent a message against Jacob; it will fall on Israel." NIV translation
Now, the Lord gives Isaiah a message for His people that was for the situation they were in. They had turned away from God and He had brought judgment upon them in hopes that they would repent and turn back to Him. We notice that it says "a message against Jacob" and we know that it is continuing to speak of judgment on His people.
"All the people will know it - Ephraim and the inhabitants of Samaria - who say with pride and arrogance of heart, 'The bricks have fallen down, but we will rebuild with dressed stone; the fig trees have been felled, but we will replace them with cedars.'" NIV translation
The people of Israel had turned away from following the ways of God and had the attitude that their ways of thinking were better than God's. Many times we may not be actually saying or thinking that our ways are better but, when we try our ways of doing things instead of God's way, our actions demonstrate that the attitude is in our hearts. This has been the problem since the fall of Satan and continues to be the problem today as we see in Psalm 2.