I saw it this afternoon, actually it has been four objects so far that was been shoot down over United states and Canada.
Also, about the Biblical reference you made there: Is Satan is coming back to fight against the forces of God would not that imply the UFOs come from underground or something similar?
Also, I would like to to elaborate on the news from Brazil. Do you mean Lula Da Silva is punish the Mark of the Beast there? I have not read about it.
Really, you should do your own studies. It's deep. But, where on Earth would you ever find a bottomless pit? ('Bottomless pit' is an accurate translation... better than 'abyss'.) The answer is at the center of the earth.
If there were a pit with a shaft that led down to the exact center of the Earth, at the center gravity would be pulling equally in all directions. It would be a pit with no bottom. If there were a 20-foot cubicle room there, whatever was in that room would be weightless. Bottomless pit.
The NASB translation of the Bible into English is probably the best one. It uses 'bottomless pit' rather than 'abyss'... Revelation 9:
1And the fifth angel sounded, and I saw a star from heaven which had fallen to the earth; and the key of the bottomless pit was given to him.
However, even the NASB translates to 'abyss' in Revelation 20:1.
Just because Satan is in the bottomless pit (abyss), doesn't mean that all the spirits of his henchmen are there with him. True UFOs are probably spiritual, but showing themselves to people who think that they are seeing physical. HOWEVER, God sends His righteous angels to help people. Whether or not they come in physical UFO vehicles at times, is really not known. Generally, Bible scholars connect UFOs with demons.
Regarding Lula Da Silva, I don't really follow him. But, the idea that there are more and more evil leaders in the world, suggests that Satan is getting ready to come up from the abyss (bottomless pit) to gather them together to fight Jesus when Jesus returns.
EDIT: Note that nobody knows when the time of the end will be. There is a lot to it.