See the original call for TMT Instrumentation White Papers (deadline for submission was March 21, 2018).
The TMT Science Advisory Committee (SAC) had released a call for White Papers for next-generation instrument capabilities. In addition, the 2017 TMT Science Forum, which was held in Mysore, India from November 7-9 (https://conference.ipac.caltech.edu/tmtsf2017), was dedicated to forming the teams to kick off the concept studies for the next generation of TMT instruments. Some of these efforts have already started over the past years, which led to the identification of instruments with specific capabilities:
These instrument concepts were explored at the TMT Science Forum held in India in November 2017. An outcome of this Forum was to respond to the call for White Papers on TMT next generation instrumentation, which will lead to launching feasibilities studies later in 2018 for all concepts ranked as top-priority by the TMT Science Advisory Committee.