There is no legal mother of record for Blanket. His birth certificate says "Unknown" for the mother. Therefore, his legal next of kin are his siblings Prince & Paris. If the 2002 will is invalidated, the 1997 will would be probated. Unfortunately for Katherine and the Jackson Family, the terms of the 1997 will so happens to be identical to the 2002 will. The only exception is that Paris and Blanket were not in that will. The courts will then abide by the 40% 40% 20% split and add Paris and Blanket to the terms as they are Michael's children. John Branca and John McClain would still be Executors as they are named executors in the 1997 will.
If the 1997 will for whatever reason is invalidated, the courts would give 100% of Michael's estate to the children. The children would then be appointed another Guardian Ad Litem (most likely an attorney) who will oversee the estate until the children are of legal age to administer it themselves. Then the situation becomes dicey because if the wills are invalidated, that means guardianship (Michael's wishes) are invalidated as well. Which mean the State of California would seek their next of kin, which happens to be Debbie Rowe, NOT Katherine Jackson.
Debbie Rowe, much like Larry Birkhead could become very powerful if the wills are invalidated. She could get custody of her children, get custody of Blanket, and legally administer Michael Jackson's estate until the children are of age.
I pray for Katherine because she is being led astray on this one.