It was around that time in 2018 that Fiona was announced, not to mention debuted, so we shall soon see if there is indeed a new girl coming in. Elise is TEC, and they usually do STM next, so most likely the next girl's going to be STM, and aside from that, she's most likely going to be Japanese due to Elise being non-Japanese. Hopefully, they'll announce that girls will be arriving at a faster rate than before (especially if it means we get Tina after the next girl).
Only way to find out is when the DMM version posts maintenance times tomorrow morning.
Don't know if they're going to do DOAFES, though.