Revelation covers pass prophecies in The Tanakh and supplies some new information. It can be taken literal and symbolic, the context will determined this.
For an example the king of the north in Daniel 11 is the same person as the beast from the sea, who is also Paul's man of sin in 2 Thessalonians.
In The Tanakh, in Daniel 11 the king of the north is seen as coming to his end. But in Revelation it is seen that the king is actually killed but is brought back to life and becomes possessed by a past Roman ruler.
There are also seven kings. Five have fallen, one is, and the other has not yet come. And when he comes, he must continue a short time. The beast that was, and is not, is himself also the eighth, and is of the seven, and is going to perdition.