According to recent reports, the Oblivion Remake is expected to be announced and released in April, possibly on the same day.
Leaker NateTheHate suggests that Bethesda Studios is targeting an April window for both the announcement and release of the Oblivion remake. It is uncertain how far apart the two will be, but NateTheHate suggests that a same-day release is possible.
The game was initially planned as a simple remaster but has since been expanded into a full-fledged remake. The scope of the remake has reportedly expanded over the years, as the project was initially slated to be a simple remaster with a 2022 release, as outlined in the leaked documents - but the project has since been reworked into a full-fledged remake.
While NateTheHate has a generally reliable track record, leaks like this should always be taken with a grain of salt.