Once Pandya's exit was sure, 24-year-old opener Gill was an obvious captaincy choice.
Mumbai Indians have traded their all-rounder Cameron Green to RCB in an all cash deal.
If the deal goes through it will possibly be the biggest player trade in IPL history. Neither franchise has yet made any public comment on the trade though.
Nehra decided to send out a player to the middle with a message for Mohit at a crucial stage in the final over.
M S Dhoni-led CSK joined Mumbai Indians as the team with most number of IPL trophies.
'The amount of love I have received all over, the easy thing would be to walk away from here, but the harder thing would be to work hard for nine months and try to play another IPL,' Dhoni said after the final.
Chasing a revised target of 171 in 15 overs, CSK were home and dry off the last ball with Ravindra Jadeja hitting a four.
If the reserve day is also affected by weather conditions or is washed out, Gujarat Titans will be declared champions since they topped the league stage.
A win on Sunday will help CSK draw level with Mumbai Indians for the most number of titles (five).
GT also have the personnel to become the first IPL franchise to win the league in their first two attempts.