I feel this year the final could be between the two comeback teams CSK and RR. This years IPL reminds me of the India vs Pakistan final clash in the first ever world T20 just after India and Pakistan were knocked out of 2007 World Cup in the group stages.
CSK and RR are in a similar position like India and Pakistan who faced lots of critisism. But for RR to win back to back knockout matches without their two premier players (Buttler and Stokes) can be difficult. But if they could manage it, then it would be really fitting reception for their comeback for them as well fans who missed them for the past two seasons.