I'm hoping that he does repent.
Guys! Satan will not nor can he repent, as his fate is already written in scripture, which must happen just the way that it is written. It is impossible for a truth to be written in the word of God and then for it to not take place, for it would bring the validity of God's word into question. The scriptures below will and must take place and that because it is written:
"And the devil, who deceived them, was thrown into the lake of burning sulfur, where the beast and the false prophet had been thrown. They will be tormented day and night for ever and ever."
"Then he will say to those on his left, 'Depart from me, you who are cursed, into the eternal fire prepared for the devil and his angels."
Regarding the above scripture, notice that the lake of fire was created for Satan and his angels. This would demonstrate that there is no reprieve for them. Jesus became a human being in order to pay the penalty for human's. He had to be kinned to us as a human being, having the same exposure to sin as we do in order for the payment to be genuine and yet he was without sin. In order for Satan and the angels to be saved, Jesus would have to perform some form of salvation for them, on their level. But that could never be and that because without faith it is impossible to please God. Satan and his angels were/are already in the presence of God and therefore, there is no faith needed on their part, already being in his presence. They rebelled against God, with heaven already being their home and being in his presence. Satan and his angels fate was sealed once they rebelled. Furthermore, it is God who gives all believers a measure of faith and is the one who leads us to repentance. The possibility of their forgiveness is not a good thing to suggest or entertain, for unfortunately, there those who believe this very thing.
Do you actually think that Satan could say to God, "Listen, about that usurping-your-throne-thing, no hard feelings? And, oh yeah, I'm also sorry about recruiting a third of all of your angels to rebel against you and all of the people that I have doomed to the lake of fire as well. Not happening!