After a lot of rumors, RHC (aka David Trimble) officially posted the cancellation of RHC series for 2019 and no definite timeline for a return. There were some reports of poor management but no matter what the series definitely brought fixed gear racing closer to the mainstream. Time will tell if it comes back or something fills the void.
From FB post:
After careful consideration of our options we will be taking 2019 off. Instead our efforts will be focused on raising support and developing plans for the continuation of the Red Hook Criterium Championship Series in the years to come. We appreciate every athlete, sponsor, volunteer, photographer, videographer, staff member, and fan who helped us build the Crit into what it is today and look forward to the next time we can bring everyone back together at the RHC
Update from Velonews:
The title sponsorship with Rockstar games ended with the 2018 series and the loss of sponsorship money and major increases in venue and other fees were the major factors. The intent is to regroup in 2019 and restart in 2020.