The official Science Adventure series Twitter account has posted a tweet teasing a potential announcement on March 17.
The tweet reads, “World line divergence ‘0.210317%.’ The story will be reproduced. #SteinsGate”
Update 03/15/21 at 10:45 a.m.: As it turns out, the tease was for a collaboration with the mobile game Shoujo Kageki Revue Starlight: Re LIVE. Details are available at Famitsu.