I doubt that because financially it would be really bad for countries like Afg, Ban, SL, Zim. When Indian team tour someone they also bring big fat checks for the host nations so all these extra tours are part of the eco system. But yeah 2-3 big players should rest, especially Bumrah and Kohli and i'm sure they will.
Sri Lanka, Bangladesh and Zimbabwe receive annual payments from the ICC ranging from $12 million to $15 million. Afghanistan was promoted to the test status relatively recently, so they receive a smaller payment. From these numbers, the financial situation looks very comfortable for these cricket boards. It is the smaller cricket boards (Netherlands, Nepal, Scotland, Kenya.etc) which are facing financial crunch, because they receive very small payments from the ICC.