  In this paper we investigate systems previously identified to exhibit transit
timing variations (TTVs) in Kepler data, with the goal of predicting the
expected improvements to the mass and eccentricity constraints that will arise
from combining Kepler data with future data from the TESS mission. We advocate
for the use of the Kullback-Leibler (KL) divergence as a means to quantify
improvements in the measured constraints. Compared to the original Kepler data,
the TESS data will have a lower signal-to-noise ratio, rendering some of the
planetary transits undetectable, and lowering the accuracy with which the
transit mid-time can be estimated. Despite these difficulties, out of the 55
systems (containing 143 planets) investigated, we predict that the collection
of short-cadence data by TESS will be of significant value (i.e. it will
improve the mass uncertainty such that the KL divergence is > 0.1) for
approximately 6 - 14 planets during the nominal mission, with the range
primarily driven by the uncertain precision with which transit mid-times will
be recovered from TESS data. In an extended mission this would increase to a
total of approximately 12 - 25 planets.
