Alright, gonna be blunt. This year, even at this late stage of the game feels a little too in flux to make any legit and proper predictions so instead here are some silly fun ones which, hopefully, won't come true.

The Balloon Moon will start to deflate midway through the performance, a small tear will form and through the midpart of the performance till the end there will be a faint "Pffffrrrrttt" noise in the background.

Either someone will loose some of their greensuit/not put it on properly so you see weird patches of flesh floating around OR for a split second the software that is keying the greenscreen stuff out will glitch out revealing all the greenness in all its glory.

If Iceland win there will be some delegations that will get pissy and threaten to pull out as they didn't have to sing live. But they'll still enter next year.

The staging will break mid performance, resulting in James having to perform a second time, however someone will have spilt wine on his pants in the lead up meaning he has to perform in his golden trousers.

Flo Rider will have had a little too much to drink by the time their performance comes along and slurs some of his words in such his way that it sounds like he is saying "Dibby dibby dibby". Serhat then writes a song called "Say Dibby Dibby Dibby".

If they don't win Destiny will vow revenge like a villain from a 1980's Saturday morning cartoon.

If they get a bad result the delegation demands the results be double checked. They are, and it turns out they received more points on the night than they really did, causing them to drop a couple places in the final results.

The top ten will be so close in points that only about 20-30 points separate the number 10 and number 1 place
That is much as I can think off of the top of my head. I don't have much time left before I have to head to a party, have fun all!