Apart from Dhoni, the franchise has retained all-rounder Ravindra Jadeja and opener Ruturaj Gaikwad, who played key roles in their title win in IPL 2021.
"Whether it's next year or in 5 years' time, we don't really know," Dhoni said during CSK's IPL victory celebration in Chennai on Saturday.
The CSK skipper said that he is not in a hurry to make the decision as there is ample time for the coming season.
The IPL mega auction is expected to take place next month.
CSK also presented a special jersey with the number 8758 (highlighting Chopra's medal-winning effort of 87.58 metres at the Tokyo Olympics) as a mark of respect to the javelin thrower.
The seam bowling all-rounder, who turned 30 on Saturday, had played a big role in CSK's triumph with figures of 3/38 in the final.
Chennai Super Kings clinched the IPL title for a fourth time with a 27-run win over Kolkata Knight Riders.
Kolkata failed to capitalise on a great start in reply to Chennai's 192/3 as the MD Dhoni-led side powered to a fourth IPL title in Dubai.
The cryptic post also built speculation around which franchise the Australian opener would prefer if given a choice in the upcoming season.
The girl was unable to stop her tears after Dhoni took CSK to yet another IPL final with a cameo..