Daniel to John
At the river with Jesus.
End and Beginning
Daniel is the last book of the Old Testament while John is the first book of the New Testament. So it might not be too surprising that Daniel finishes with something akin to "THE END" and John starts "In the beginning."
The presence of red words at the end of Daniel is a tip off that Jesus is the voice speaking to Daniel. John then begins by stating that the "word" (which is code for "Jesus") was in the beginning. In other words, go back and read the Old Testament again, because Jesus is there. He appears and speaks often, in fact, like near the end of Daniel.
Jesus at the River
Jesus visits Daniel and John at the river's edge.
Jesus went to Daniel at the Euphrates river and gave him a rather long vision that stretches to the end of his book. Jesus visited John at the edge of the Jordan where he was baptizing, ultimately to be baptized by him and revealed to Israel.
Daniel has the baptism theme too, but it's less obvious. Daniel is told he will rise from the dead at the end of days. Baptism pictures death and resurrection. It's a picture of Jesus' death and resurrection. By dying to one's own desires and following Jesus the promise of actual resurrection and everlasting life is attained. Daniel was promised resurrection because he did what Jesus told him.
Daniel had trouble standing when Jesus showed up at the river. He fell forward on his face, only to be picked up by Jesus. It looks like Jesus baptized Daniel. Daniel does not say explicitly that he fell in the water, but the description of where he was and what happened coupled with the baptism theme shared by Daniel and John strongly suggests this. So Jesus baptized Daniel in the Euphrates and John baptized Jesus in the Jordan.
Other Notes
Aramaic
Aramaic is the language of the New Testament, though it was quickly translated to Greek to supply the increasing interest in copies of the Bible by Greek readers. Half of Daniel was written in Aramaic. The other being Hebrew.
Daniel, as the last book of the Hebrew Old Testament, anticipates the language shift that occurs with John and the New Testament. He shows the future of the text by writing half the content in Aramaic. Daniel seems to know what's coming in terms of the text itself and models what the finished product would look like in miniature by writing a book in two languages.
Daniel & Revelation
Daniel is often compared with Revelation and studied in parallel. There are a number of correlations shared between the books, which is why they are studied together so often. One example is the way Daniel is told to seal his word, but John is told not to seal. Why? Daniel was not at the end yet, but John was. Some of the parallels make sense in light of the book order placing Daniel at the end of the Old Testament.