God makes it very clear that once He acts, no one can change it.

Isa 43:13
Yes, and from ancient days I am he. No one can deliver out of my hand. When I act, who can reverse it?"

John 10:28-30
I give them eternal life, and they shall never perish; no one can snatch them out of my hand. My Father, who has given them to me, is greater than all; no one can snatch them out of my Father's hand. I and the Father are one."

The following passages make the connections between Old and New Testaments.

Isa 44:6
"This is what the LORD says-- Israel's King and Redeemer, the LORD Almighty: I am the first and I am the last; apart from me there is no God.

Rev 22:13
I am the Alpha and the Omega, the First and the Last, the Beginning and the End.

And more connections…

Isa 44:8
Do not tremble, do not be afraid. Did I not proclaim this and foretell it long ago? You are my witnesses. Is there any God besides me? No, there is no other Rock; I know not one."

1 Cor 10:4
and drank the same spiritual drink; for they drank from the spiritual rock that accompanied them, and that rock was Christ.

And even more connections…

Isa 44:24
"This is what the LORD says-- your Redeemer, who formed you in the womb: I am the LORD, who has made all things, who alone stretched out the heavens, who spread out the earth by myself,

John 1:1-3
In the beginning was the Word, and the Word was with God, and the Word was God. He was with God in the beginning. Through him all things were made; without him nothing was made that has been made.

And still more…

Isa 45:3
I will give you the treasures of darkness, riches stored in secret places, so that you may know that I am the LORD, the God of Israel, who summons you by name.

John 10:3
The watchman opens the gate for him, and the sheep listen to his voice. He calls his own sheep by name and leads them out.

The Bible proves that it is one continuous story from beginning to end!