Contradiction with Isaiah 42:8
This verse emphasizes that God will not share His glory with another, potentially in contrast to Isaiah 41:27, which heralds a message brought by a chosen figure.
Isaiah 42:8: I [am] the LORD: that [is] my name: and my glory will I not give to another, neither my praise to graven images.
Contradiction with Isaiah 43:10
This verse insists that there is no God formed before or after, which could contrast with the declaration of a new leader or messenger.
Isaiah 43:10: Ye [are] my witnesses, saith the LORD, and my servant whom I have chosen: that ye may know and believe me, and understand that I [am] he: before me there was no God formed, neither shall there be after me. [no...: or, nothing formed of God]
Contradiction with Isaiah 45:5
This verse states there is none besides God, seemingly contradicting the distinction of a particular envoy as suggested in Isaiah 41:27.
Isaiah 45:5: I [am] the LORD, and [there is] none else, [there is] no God beside me: I girded thee, though thou hast not known me:
Contradiction with Jeremiah 31:34
Here, it is stated that all will know the Lord directly, which might oppose the need for a singular messenger as indicated in Isaiah 41:27.
Jeremiah 31:34: And they shall teach no more every man his neighbour, and every man his brother, saying, Know the LORD: for they shall all know me, from the least of them unto the greatest of them, saith the LORD: for I will forgive their iniquity, and I will remember their sin no more.
Contradiction with Matthew 11:11
This verse declares that none born of women are greater than John the Baptist, which could challenge the prominence of a figure mentioned in Isaiah 41:27.
Matthew 11:11: Verily I say unto you, Among them that are born of women there hath not risen a greater than John the Baptist: notwithstanding he that is least in the kingdom of heaven is greater than he.