There is a lot of competition for the wicket-keepers role and as far as I know, Sanju Samson is not the most preferred player for the selectors. Among the youngsters, the top two choices are Rishabh Pant and K. L. Rahul (although the latter is an occasional wicket-keeper). Both represent powerful state associations, with Pant representing Delhi and Rahul representing Karnataka. Sanju Samson may rank third in this list (provided the selectors are no longer interested in Dinesh Karthik and Wriddhiman Saha).
Apart from them, the player pool is very vast. A number of youngsters are on the fringes, and examples are Parthiv Patel of Gujarat, Naman Ojha of Madhya Pradesh, Ishan Kishan from Jharkhand, Ankush Bains from Himachal Pradesh and Srikar Bharat from Andhra Pradesh. Among this group perhaps Ishan Kishan is the most promising one. But none of them got as many opportunities as Pant and Rahul got. And none of them seems to have any political connection unlike the case of Dinesh Karthik.