The official announcement was made on Thursday June 27th.  The SLS Las Vegas will be renamed the Sahara Las Vegas in the fall.  This “rumor” was first reported on VegasChanges.com on June 4th.  Link to original article is posted below.

SLS Las Vegas owner Alex Meruelo welcomed invited guests as he made a major announcement regarding the exciting changes happening at the casino-resort which continues to undergo a $100 million transformation.

The SLS Las Vegas will now be known as Sahara Las Vegas, returning to the previous name of the resort, which opened as Hotel Sahara in 1952. The Sahara closed in 2011 before reopening in 2014 as the SLS. Meruelo says there will be new restaurants, bars, and casino floor as part of the renovation and name change.  ORIGINAL ARTICLE from June 4th:

https://vegaschanges.com/2019/06/04/sls-las-vegas-to-be-rebranded-back-to-the-past/

Former Sahara Hotel & Casino
SLS Las Vegas to become Sahara Las Vegas in the fall