A time ago was rumored that PlayStation was going to rebuild the PlayStation Plus service with three tiers. According to Ventura Beat, the tiers will be called Essential, Extra and Premium:

Essential: the current PS Plus service with monthly games. $10 per month.

Extra: monthly games and a game catalog of hundreds of downloadable games. It looks like the games available on PS Now transferred to this service. $13 per month.

Premium: monthly games, game catalog with streaming capabilities and a library of classic titles and game trials (similar to the service offered by EA on EA Play). $16 per month.

We should know more from Spartacus in some weeks.

Thanks, Ventura Beat.