Michael Jackson -- MJ Estate Slams New Molestation Claim

10:00 A.M. PDT -- Howard Weitzman -- attorney for Jackson's estate -- tells TMZ Safechuck has denied many times over the past 25 years that Michael ever did anything inappropriate to him ... but is "now demanding money from Michael's Estate by claiming he suddenly recalls life differently." Weitzman says Michael is no longer able to defend himself, but "we believe these false and scurrilous allegations will not prevail."

A new sexual molestation claim has been filed against the estate of Michael Jackson by a man who claims the singer sexually abused him from the time he was 10 until he was around 15 ... this according to a new report.

This latest claim was added on to the lawsuit filed by Wade Robson last year, so says The Daily Beast. The filing is sealed, but the site reports the claims are being made by James Safechuck, who appeared as a child alongside Jackson in a 1987 commercial for Pepsi (see below).

According to the report, Safechuck had long denied being sexually abused by Jackson, but decided to come forward after Robson made his claims public.

There were rumors about Jackson's relationship with Safechuck in the late 80s ... the singer was often seen with the young boy following their commercial together ... including the opening performance of "The Phantom of the Opera" with Liza Minnelli (see above).

The Estate has already objected to Robson's claim because it was both suspicious and filed too late.