@Aaron
Let's telescope out a bit.
Everything that He has done, brings glory to God.
The creation of man,
man sinning and alienating ourselves from Him thereby being put into the position of needing a Saviour,
the elect glorifying God for their unspeakable gift of eternal life,
God's righteous judgment of sinners by His Son,
Etc.
Was the cross the main reason God created the Heavens and the earth?
I'd have to say "no".
His glorification was.
For example,
Lucifer wants worship and to be like the Most High, but cannot do anything truly miraculous to warrant it, from my perspective and from what I see in Scripture.
The Lord
guarantees worship based on everything He is and has done,
while Satan ( the adversary ) guarantees that he will be looked at "narrowly" by many ( Isaiah 14:12-21 ) based on what he has done.
Lucifer will not get the worship he wants,
and the Lord will get the worship He deserves and commands.
Was the cross the main event?
No, the Lord
Himself, is.
