User blog comment:Ḡwẵine Ḹٍٍkƨ Ĺiĸe Ͼềлȑềd/Series 5 speculations and predictions/@comment-3012002-20120217101429

1) Merlin will reveal his magic (FINALLY!) 2) Merlin will will become the advisor of legend 3) The third le Fay sister of legend, Elaine shows up (not much is known about her in the legend) 4) King Lot will make an appearance... or two 5) Gaius dies (sorry Richard!) 6) It is revealed that Mordred is Morgause's son hence Morgana's nephew 7) Flashbacks from the Time of the Great Purge in which mentioned and/or deceased characters are seen (Uther, Ygraine, Gorlois, Vivienne, etc) 8) Mordred and/or Nimueh return 9) Gwen becomes a warrior queen 10) Tristan reappears and becomes a knight 11) Bors, Kay and Galahad make appearances and become knights 12) Arthur and Gwen run into marriage issues (don't all marriages?) 13) Morgana meets her doom at Merlin's hands 14) Aithusa becomes evil and sides with Morgana 15) Mordred (if he appears) becomes evil and sides with Morgana 16) Kilgarrah kills Aithusa in battle