New leaders, new combinations, expensive leggies
Only 18 players have been retained by the IPL franchises, a whopping 578 are up for sale. What might we expect from the 2018 player auction?

ESPNcricinfo Ltd
Kolkata Knight Riders, Delhi Daredevils and Kings XI Punjab are yet to appoint or identify their captain. These three teams may look at leadership options early in the auction and can be expected to bid big on a few of them. Historically, overseas captains have not been as successful as Indian captains. Shane Warne (2008), Adam Gilchrist (2009) and David Warner (2016) are the only ones to win the tournament. Many other overseas captains have been removed mid-way through the tournament or have failed to make an impact. There could be multiple reasons for this - chiefly the fact that teams can only play four overseas players in their XI - but it is important franchises keep this in mind before choosing a captain. While Faf du Plessis and Kane Williamson are two serious overseas-captain options, neither has been a consistent member of playing XIs over the last two years, and it would be a surprise if teams choose either of them as captain.
Having retained a few players already, most of the franchises could look to buy back players who have played for them in the last two seasons rather than building an entirely new team. Historically, Chennai Super Kings, Mumbai Indians, Knight Riders and Sunrisers Hyderabad have swapped very few players and ensured the core squad remains the same. This has been a successful model across the world, as the likes of Perth Scorchers and Trinbago Knight Riders have shown. It would not be a surprise if teams like Super Kings and Mumbai look to bring back at least 60 to 70% of their players from recent seasons. In case they are not able to get the players, they will look for the same combination that has worked for them. However, less-successful teams such as Kings XI and Daredevils may look to revamp their squad yet again in search of that elusive title.
As with any auction, supply and demand determines the cost of the player. The T20 format does not favour pure wicketkeepers. At some level, they are a liability. Power-hitting keepers or opener-keepers are likely to be in demand because they help balance their squads. As always, such players are rare and in high demand. The likes of Jos Buttler, Quinton de Kock and Dinesh Karthik are likely to attract big bids.
It has become important, over the last two seasons, for teams to have strong uncapped players in their squad. Teams featuring less-known faces performing consistently often tend to make the playoffs. Examples of this would include Rahul Tripathi for Rising Pune Supergiant last season, Krunal Pandya for Mumbai over the last two seasons, and Manan Vohra for Kings XI in 2014.
Gaurav Sundararaman is a senior stats analyst at ESPNcricinfo