Although it is only a rumor, the Japanese company could add less well-known games to the Switch Online service for Mario's 35th anniversary, as we have been able to read in a Nintendo Life article. The pool provided by a source which does not share his name in the original article He mentions some titles that never saw the light, Mario fans, those who claim to have played everything about the Nintendo mascot could come across authentic jewels.
Nintendo has found that consistently providing quality Mario games has made the series obsolete. So he has decided to unearth hidden gems from Mario's past to balance things out and cheer them up. Those who are old enough to remember such games will be delighted with the entertainment, while the rest of the players will be surprised with an alternative story of what Mario could have been.
As the unknown source points out, it is believed that Nintendo is dusting unpublished CD-i titles, such as Mario Wacky Worlds and Mario Takes America for their 35th anniversary